How to Pronounce -TION and -SION Endings in English

1. The station was crowded with commuters rushing to catch the early morning train.
2. Her decision to study abroad changed the direction of her entire career.
3. The education system in that country went through a major transformation last year.
4. She expressed her passion for music through weekly lessons and daily practice at home.
5. The television was on in the background, but nobody was paying any attention to it.

The -TION ending is one of the most frequent suffixes in English, appearing in thousands of everyday words: action, nation, education, communication, imagination. Yet most learners mispronounce it - not because it is genuinely difficult, but because the spelling offers almost no hint about the sound. The letters -TION produce the sound /ʃən/ - one syllable, rhyming with the English word "shun" - not "TEE-on" or "SHEE-on." The related -SION ending follows the same /ʃən/ sound in some words (tension, passion) but shifts to /ʒən/ - the ZH sound, like the S in "measure" - in others (vision, decision). This guide gives you the complete IPA breakdown, the one rule that covers 95 percent of all -TION and -SION words, and a structured practice sequence that makes both suffixes feel automatic.

IPA Pronunciation of the -TION and -SION Endings

English uses two sounds for the -TION and -SION endings, depending on what comes before the suffix.

-TION: always /ʃən/

American English: /ʃən/ · British English: /ʃən/ · Phonetic: SHUN

Examples: nation /ˈneɪ.ʃən/, action /ˈæk.ʃən/, station /ˈsteɪ.ʃən/, education /ˌed.jʊˈkeɪ.ʃən/, communication /kəˌmjuː.nɪˈkeɪ.ʃən/, imagination /ɪˌmæd͡ʒ.ɪˈneɪ.ʃən/

-SION after a vowel: /ʒən/

American English: /ʒən/ · British English: /ʒən/ · Phonetic: ZHUN

Examples: vision /ˈvɪʒ.ən/, decision /dɪˈsɪʒ.ən/, division /dɪˈvɪʒ.ən/, occasion /əˈkeɪʒ.ən/, conclusion /kənˈkluːʒ.ən/, confusion /kənˈfjuːʒ.ən/, explosion /ɪkˈspləʊʒ.ən/

-SION after a consonant: /ʃən/

American English: /ʃən/ · British English: /ʃən/ · Phonetic: SHUN (same as -TION)

Examples: tension /ˈten.ʃən/, passion /ˈpæʃ.ən/, mansion /ˈmæn.ʃən/, pension /ˈpen.ʃən/, mission /ˈmɪʃ.ən/, session /ˈseʃ.ən/

The key sound components: /ʃ/ is the hushing sound in "ship" and "shoe." /ʒ/ is the voiced version of /ʃ/ - the same sound as the S in "measure" and "treasure." /ə/ is the neutral schwa vowel. /n/ is the nasal consonant. Combined: SHUN or ZHUN - one quick syllable at the end of the word.

Step-by-Step Guide to Pronouncing -TION and -SION

Both endings share the same physical components. Here is how to produce each sound:

1. Step 1: Produce the /ʃ/ sound - for -TION and consonant -SION
2. Raise the front of your tongue toward the hard palate - the roof of your mouth just behind the alveolar ridge - but stop short of touching it. Round your lips very slightly outward. Push a steady stream of air through the gap between your tongue and the palate. The result is a hushing sound, identical to the "sh" in "ship," "shoe," and "shadow." There is no stop, no burst of air - just continuous airflow. Practice this in isolation first: "sh... sh... sh." Then attach "un" to it: "SHUN." That complete syllable is the entire -TION ending - in every word, without exception.
3. Step 2: Produce the /ʒ/ sound - for -SION after a vowel
4. Same tongue position as /ʃ/. Same slightly rounded lips. Same continuous airflow. The only addition: switch on your vocal cords. Let them hum gently as the air passes through. The result is the voiced version of "sh" - the same sound as the S in "measure," "treasure," and "usual." Practice: say "measure" slowly and isolate the middle consonant between the two syllables. Hold it: "zhhhh." That is /ʒ/. Now attach "un" to it: "ZHUN." That is the vowel-preceded -SION ending.
5. Step 3: Add the schwa and the /n/
6. After the /ʃ/ or /ʒ/, the ending contains a very brief, unstressed schwa /ə/ - the neutral "uh" vowel - followed by the nasal /n/. In natural speech, the schwa is so short it almost disappears into the N. Do not elongate or stress it. The total ending is one quick, light syllable: SHUN or ZHUN. Practice with a real word: "na" + "SHUN" = "nation." "vi" + "ZHUN" = "vision."

The practical shortcut: say the English word "shun" (to deliberately avoid). That syllable is the complete -TION ending. Now activate your vocal cords on the "sh" and you have the vowel -SION ending: "zhun."

Why Do -TION and -SION Sound Like "SHUN"?

This is where most guides stop - but the origin explains why the T produces no /t/ sound and makes the rule permanently memorable.

The -TION suffix descends directly from the Latin noun-forming suffix -tionem, the accusative case of -tio. Latin used this suffix to build abstract nouns from verb stems: agere (to act) became actio, then actionem; narrare (to tell) became narratio, then narrationem. In Classical Latin of the 1st and 2nd centuries AD, the sequence -tionem was pronounced with a full /t/ before the /i/ - something close to "ak-TI-oh-nem." The T was a real consonant, clearly audible. Latin was the language of law, administration, and scholarship across the Roman Empire, and these words were used constantly in formal writing and speech.

The sound change happened gradually during Late Latin and early Medieval Latin, approximately the 5th through 8th centuries AD. In the spoken Latin of the western provinces - the regions that would become France, Spain, and Italy - the consonant cluster /ti/ before a vowel began to shift. The sequence /ti/ → /tsi/ → /si/ → and eventually, in the French-speaking territories, → /ʃ/. This process, called palatalization, was driven by the /i/ vowel, which is produced near the hard palate - pulling the preceding consonant toward the palate as well. By the time Old French emerged as a distinct language in the 9th and 10th centuries, the suffix had already become -cion or -tion with the /ʃ/ sound firmly in place. The spelling retained the Latin letters; the sound had moved on without them.

English acquired these words from Old French during and after the Norman Conquest of 1066. The massive wave of French borrowings into English that occurred in the 12th, 13th, and 14th centuries brought thousands of -TION words directly from Old French, complete with the /ʃən/ pronunciation. The -SION suffix has a parallel history, deriving from Latin -sionem. Where -TION palatalized to /ʃ/ (voiceless), -SION after a vowel underwent the voiced version of the same change: /zi/ → /ʒ/. After a consonant, however, -SION followed the same voiceless path as -TION, arriving at /ʃən/. This is why the two -SION sounds split along the vowel-consonant boundary - a distinction that was baked into the French form of the words before English ever borrowed them.

The Two -SION Sounds: When to Use /ʒən/ vs /ʃən/

-SION After a Vowel: /ʒən/ (ZHUN)

When -SION is preceded by a vowel letter (a, e, i, o, u), the result is /ʒən/. Common examples: vi-SION (i + sion), de-ci-SION (i + sion), di-vi-SION (i + sion), oc-ca-SION (a + sion), con-clu-SION (u + sion), con-fu-SION (u + sion), il-lu-SION (u + sion), ex-plo-SION (o + sion), e-ro-SION (o + sion), in-va-SION (a + sion). If the letter immediately before -SION is a vowel, use ZHUN. No exceptions for standard everyday vocabulary.

-SION After a Consonant: /ʃən/ (SHUN)

When -SION is preceded by a consonant letter, the result is /ʃən/ - identical to -TION. Common examples: ten-SION (n + sion), man-SION (n + sion), pen-SION (n + sion), pas-SION (ss = consonant sound), mis-SION (ss = consonant sound), ses-SION (ss = consonant sound), ver-SION (r + sion). Words ending in -SSION (passion, mission, session, permission, admission) always use /ʃən/ because the double S signals a voiceless environment. The rule to memorize: one letter check before -SION. Vowel → ZHUN. Consonant → SHUN.

Minimal Pairs - Train Your Ear

These three word pairs isolate the key contrasts in -TION and -SION pronunciation:

1. vision /ˈvɪʒ.ən/ vs mission /ˈmɪʃ.ən/ - One letter different at the start (v vs m), but the critical contrast is the suffix sound. In vision, the letter I precedes -SION: vowel → /ʒən/ (ZHUN). In mission, the double-SS precedes -SION: consonant → /ʃən/ (SHUN). Alternating between these two words back-to-back trains your ear to hear the /ʒ/-/ʃ/ contrast in its natural context - the exact environment where most learners confuse the two sounds.
2. decision /dɪˈsɪʒ.ən/ vs tension /ˈten.ʃən/ - Both are -SION words, but the vowel check gives different results. In decision, the letter I precedes -SION → /ʒən/. In tension, the letter N precedes -SION → /ʃən/. This pair is especially useful because both words are frequent in professional and academic English - the exact context where clear pronunciation matters most. Drilling these two together locks in the vowel-consonant rule through real vocabulary.
3. nation /ˈneɪ.ʃən/ vs passion /ˈpæʃ.ən/ - Different suffix spellings (-TION vs -SSION) but an identical ending sound: /ʃən/. Alternating between these two confirms that -TION and consonant-preceded -SION are truly the same sound, which simplifies the learning task significantly. If you can say nation and passion with the same SHUN ending, you have mastered the core rule.

Say each pair five times. Pay attention to whether you feel vocal cord vibration during the suffix: ZHUN has a buzz; SHUN does not.

Common Mistakes When Pronouncing -TION and -SION

These are the specific errors non-native speakers make most often, with the exact reason each one happens:

1. Mistake 1 - Adding an extra syllable: SHEE-ON instead of SHUN (especially Filipino learners): Filipino learners frequently produce two syllables for the ending - saying na-SHEE-ON for nation, ed-u-KAY-SHEE-ON for education, and com-mu-ni-KAY-SHEE-ON for communication. The -TION ending doubles from one syllable to two. This happens because Tagalog and other Philippine languages have a more open syllable structure, and Filipino English speakers sometimes insert a vowel before the final N to match familiar syllable patterns. The resulting extra syllable makes words sound unnaturally elongated - a native speaker immediately notices. The fix is to treat the ending as a single beat: SHUN. Rhyme the ending with the English word shun (to deliberately avoid something) - same vowel, same N, same length. Na-SHUN. Not na-SHEE-on.
2. Mistake 2 - Pronouncing the T as /t/: TEE-ON instead of SHUN (universal across all learner groups): Nation becomes na-TI-on, action becomes ak-TI-on, education becomes ed-u-KAY-ti-on. The learner reads the letter T and fires the /t/ sound. This is a direct spelling-transfer error - exactly the same mechanism that causes learners to pronounce the B in debt. In the case of -TION, the T has not been pronounced as /t/ in any major variety of English for approximately 700 years. The sound change happened in Late Latin and was locked into French pronunciation long before English borrowed these words. The letter T in -TION is a spelling fossil - it records where the word came from, not how to say it. The fix: when you see -TION, cover the T with your finger. The suffix that remains is -ION, and the whole thing reads as one syllable: SHUN. There is no T sound. There never was, in English.
3. Mistake 3 - Using /ʃən/ for all -SION words, including vowel-preceded ones (especially Indian learners): Learners who have successfully learned the -TION rule sometimes apply /ʃən/ uniformly to all -SION words as well, saying VI-shun for vision and de-SI-shun for decision instead of the correct /ʒ/ sound. This is an overgeneralization error - the brain learns one rule and applies it everywhere, even where a different rule applies. Indian English speakers are particularly prone to this because the /ʒ/ phoneme does not exist as a distinct sound in most Hindi-influenced English varieties; /ʃ/ is the nearest available substitute in the L1 sound system. The fix is the one-letter check: look at the letter directly before -SION. If it is a vowel (i in vision, i in decision, u in conclusion), use ZHUN. If it is a consonant (n in tension, ss in passion), use SHUN. Practice the sentence the decision caused tension - it contains both /ʒən/ and /ʃən/ in immediate context.

Practice Tips

1. The SHUN Word: Say the English word shun (to deliberately avoid something) out loud. That one syllable is the complete -TION ending and the consonant -SION ending. Attach it to any stem: nay + SHUN = nation, ak + SHUN = action, ten + SHUN = tension. Once you have the standalone word shun locked in, all -TION words follow automatically.
2. The Measure Drill: The /ʒ/ sound in vowel-preceded -SION is the same sound as the S in measure and treasure. Say measure slowly and isolate the middle consonant: zhhhh. Hold it for two seconds. Then attach un: ZHUN. Practice that syllable alone until it feels natural, then apply it to vision (vi + ZHUN), decision (de-ci + ZHUN), and conclusion (con-clu + ZHUN).
3. The One-Letter Check: Before saying any -SION word, spend two seconds checking the letter directly before -SION. Vowel → ZHUN. Consonant → SHUN. After 10 to 15 conscious repetitions, this check becomes automatic and you stop needing to think about it.
4. Record and Compare: Use the Pronounce Checker tool above with the sentence the decision caused tension and division in the nation. This sentence contains both /ʒən/ endings (decision, division) and /ʃən/ endings (tension, nation) in a single phrase. Scoring your pronunciation on this sentence covers both rules at once.
5. Related Words: The /ʃ/ sound in -TION is the same fricative covered in our guide to the TH sound in English - another case where English spelling patterns fail to predict the real sound. For a broader view of English pronunciation traps that affect Filipino and Indian learners, see our list of the 10 most commonly mispronounced English words.

Frequently Asked Questions

How do you pronounce -TION in American English?

In both American and British English, -TION is always pronounced /ʃən/ - one syllable, rhyming with the word shun. The T produces no /t/ sound; the entire sequence TI reduces to the single fricative /ʃ/. This pronunciation is consistent across all -TION words in standard English, from action and nation to communication and imagination, in both major accent varieties.

Why does -TION sound like SHUN and not TEE-ON?

The sound change happened in Late Latin during approximately the 5th through 8th centuries AD, when the consonant cluster /ti/ before a vowel palatalized progressively: /ti/ to /tsi/ to /si/ to /ʃ/ in the dialects that became French. English borrowed these words from Old French in the 13th and 14th centuries, long after the /ʃ/ pronunciation was already fixed in place. The letter T in -TION has not represented a /t/ sound in English for approximately 700 years - it is a spelling fossil that records Latin origins, not current pronunciation.

What is the difference between -TION and -SION pronunciation?

-TION always produces /ʃən/ (SHUN). -SION produces either /ʒən/ (ZHUN) or /ʃən/ (SHUN) depending on the letter directly before it. When -SION follows a vowel letter - as in vision (i), decision (i), and conclusion (u) - the result is /ʒən/ with a voiced buzz. When -SION follows a consonant - as in tension (n), passion (ss), and mission (ss) - the result is /ʃən/, identical to -TION. One-letter check before -SION: vowel gives ZHUN, consonant gives SHUN.

How many syllables does the -TION ending add?

The -TION ending always adds exactly one syllable: /ʃən/ (SHUN). It does not add two syllables (shee-on or tee-on). The syllable count for common words: na-TION = 2, ac-TION = 2, sta-TION = 2, ed-u-CA-TION = 4, com-mu-ni-CA-TION = 6. In every case, the final syllable is SHUN - one beat, no matter how long the word that precedes it.

Quick Recap

1. -TION always = SHUN (/ʃən/). The T produces no /t/ sound. Nation, action, station, education - all end in one syllable: SHUN.
2. -SION after a vowel = ZHUN (/ʒən/). Vision, decision, conclusion, confusion - vowel before -SION triggers the voiced /ʒ/ sound.
3. -SION after a consonant = SHUN (/ʃən/). Tension, passion, mission, mansion - consonant before -SION gives the same /ʃ/ as -TION.
4. The one-letter check covers 95 percent of all -TION and -SION words: look at the letter before -SION. Vowel → ZHUN. Consonant (or -TION) → SHUN.

Use the practice tool above to check your pronunciation with real audio feedback. Happy practicing!