How to Pronounce -OUGH Words in English

1. We walked through the old part of the city.
2. I never thought the exam would be that difficult.
3. The meat was surprisingly tough to chew.
4. She has had a bad cough for almost a week.
5. It was raining, though, we still went for a walk.

“Through,” “thought,” “though,” “tough,” “cough,” and “bough” all end in the identical four letters - o, u, g, h - and all six are pronounced in completely different ways. There is no rule you can apply by looking at the spelling alone; each word simply has to be learned as its own sound. This guide gives you all six pronunciations with IPA, the historical reason English never cleaned this up, and a memory system that groups the six sounds so you stop guessing.

IPA Pronunciation of Every -OUGH Sound

Here are the six major -ough pronunciations in English, each with IPA and a common example:

1. /uː/ (“oo”) - through /θruː/, rhymes with “blue.”

2. /ɔː/ (“aw”) - thought /θɔːt/, bought, brought, ought - rhymes with “bought.”

3. /oʊ/ (“oh”) - though /ðoʊ/, dough, although - rhymes with “go.”

4. /ʌf/ (“uff”) - tough /tʌf/, rough, enough - rhymes with “stuff.”

5. /ɒf/ (“off”) - cough /kɒf/, trough - rhymes with “off.”

6. /aʊ/ (“ow”) - bough /baʊ/, drought, plough (British spelling of plow) - rhymes with “cow.”

Six sounds from four fixed letters is the most extreme inconsistency in English spelling, and there is no visual cue in the word itself to tell you which of the six applies.

A seventh, rarer pronunciation also exists: /ʌp/ as in “hiccough,” an older variant spelling of “hiccup” that is pronounced exactly like “hiccup” despite ending in the same four letters as the other six categories. Most modern writing now uses “hiccup” instead, but “hiccough” still appears occasionally in older or more formal text, and it is worth recognizing on sight even if you rarely need to produce it yourself. Treat it as the exception that proves the rule: even native speakers usually cannot guess its pronunciation from the spelling alone.

Step-by-Step Guide: Producing Each -OUGH Sound

1. /uː/ as in through
2. Round your lips tightly and push your tongue back and up, the same shape as “too” or “blue.” The GH is completely silent - it contributes nothing to the sound.
3. /ɔː/ as in thought
4. Open your mouth moderately with rounded lips, tongue low and back - the same vowel as “saw” or “ball.” Again, the GH is silent; only the vowel and the final /t/ (in thought) matter.
5. /oʊ/ as in though
6. A diphthong gliding from a mid-back rounded vowel toward /ʊ/, the same as “go” or “no.” The GH is silent here too.
7. /ʌf/ as in tough
8. Here the GH is not silent - it is pronounced as an /f/ sound, identical to the F in “stuff.” Say a short, central “uh” vowel and finish with your top teeth lightly touching your bottom lip for the F.
9. /ɒf/ as in cough
10. Also an /f/ ending, but with a different, more open back vowel than “tough” - the same vowel as “off” or “dog” in American English, followed by the same lip-to-teeth F.
11. /aʊ/ as in bough
12. A diphthong starting open and gliding toward a rounded /ʊ/, identical to “cow” or “now.” The GH is silent once again.

Notice the pattern: in four of the six sounds, GH is completely silent; in exactly two (tough-type and cough-type), it becomes an /f/. Learning that split alone eliminates half the guessing.

Why Does -OUGH Have So Many Sounds?

This is the single most famous example of English spelling and pronunciation drifting apart, and the reason is historical, not random. In Old and Middle English, the letters “gh” represented a real consonant sound - a voiceless velar fricative /x/, the same throat-scraping sound still heard today in the Scottish word “loch” or the German word “Bach.” Words like “through,” “thought,” “tough,” and “cough” all genuinely contained this guttural sound when they were first spelled with GH, centuries before the sound itself began to disappear from most English dialects.

Between the 14th and 17th centuries, the /x/ sound gradually vanished from English speech - but it vanished differently in different words, depending on regional dialect and the sounds surrounding it, rather than disappearing uniformly everywhere at once. In some words it dropped out entirely, leaving only the vowel (through, though). In others it hardened into an /f/ sound instead of disappearing, because /x/ and /f/ are both voiceless fricatives and were close enough acoustically for speakers in certain regions to shift one into the other (tough, cough, enough). English spelling had been mostly fixed by the introduction of the printing press in the 15th century, so once printers standardized “gh” in these words, the spelling froze in place - while the pronunciation kept quietly drifting apart, word by word, for centuries afterward.

This is why there is no live rule to apply today: you are not looking at a spelling pattern with logic baked in, you are looking at a fossil of six different historical outcomes of the exact same original sound, frozen at different stages of change.

Linguists sometimes call English spelling a “historical” rather than a “phonetic” writing system for exactly this reason: it preserves a record of how words used to sound centuries ago far more faithfully than it reflects how they sound today. French and Chinese writing systems show similar historical layering, while languages with more recently standardized spelling, like Finnish or Korean's Hangul, stay much closer to a one-symbol-one-sound relationship. Knowing that English spelling is a historical record, not a live phonetic code, can actually make the six -ough sounds feel less like an arbitrary trap and more like an interesting artifact - six fossils sitting side by side in six ordinary, everyday words.

British vs. American Pronunciation of -OUGH Words

American English

All six sound categories exist in American English largely as described above. One notable difference: American English tends to merge the “cough” vowel /ɒf/ closer to the “thought” /ɔː/ vowel region, so cough and off often sound slightly different from how a British speaker produces them.

British English

British English keeps a more distinct rounded, open back vowel in “cough,” closer to /kɒf/ with a fuller, more rounded O than the American version. The “thought” category /ɔː/ is also typically more rounded and further back in British Received Pronunciation than in General American English.

Both are correct - choose the accent you are learning and stay consistent, since the six-way -ough split exists in both varieties regardless of these smaller vowel-quality differences. If you switch between American films and British podcasts as listening practice, expect these small vowel shifts to show up most noticeably in exactly this word family.

Minimal Pairs - Train Your Ear

These pairs isolate the contrast between two different -ough sounds directly:

1. tough /tʌf/ vs. though /ðoʊ/ - one keeps the GH as an F, the other drops it entirely; also note the completely different starting consonant (T vs. voiced TH).
2. through /θruː/ vs. thought /θɔːt/ - identical starting consonant cluster, completely different vowel - the clearest proof that -ough alone tells you nothing.
3. cough /kɒf/ vs. dough /doʊ/ - one ends in a hard F sound, the other in a pure vowel with nothing pronounced at all after it.

Say each pair out loud five times, focusing on whether the GH survives as an F or disappears completely in each word. If you find yourself defaulting to one sound out of habit, slow down and consciously check which of the six categories the word belongs to before speaking, the same discipline you would apply to a homograph like “lead” or “tear.”

Common Mistakes When Pronouncing -OUGH Words

These are the specific errors learners make most often:

1. Mistake 1 - Applying one -ough sound to every word: Learners who master “through” often assume “though” and “tough” rhyme with it, producing “thoo” and “too-f.” The root cause is a reasonable assumption that identical spelling means identical sound - which fails completely here. The fix: memorize each -ough word as its own vocabulary item with its own sound, the same way you would an irregular verb.
2. Mistake 2 - Pronouncing the GH as a hard G or K: Saying “thoght” with a hard G, or “cog-h” with a K sound, applies a literal letter-by-letter reading that no dialect of English actually uses. The fix: remember GH is either silent or an /f/ - it is never a G or K sound in modern English.
3. Mistake 3 - Confusing though and through in fast speech: Because both words are extremely common and superficially similar in spelling, listeners occasionally mishear one for the other if the vowel is not fully clear. The fix: exaggerate the vowel length difference - through uses a long, rounded “oo,” while though uses the shorter gliding “oh” diphthong.

Practice Tips

1. Group by Sound, Not by Spelling: Make six small groups - through-type, thought-type, though-type, tough-type, cough-type, bough-type - and drill each group together rather than treating -ough as one category.
2. Learn the Silent-vs-F Split First: Before memorizing all six, just learn which -ough words keep GH as an F (tough, cough, enough, rough) and treat every other -ough word as silent. This single split resolves most everyday confusion.
3. Record and Compare: Use the Pronounce Checker tool above to record each -ough word and compare it against native audio - this is one pattern where your ear genuinely needs a model, since no rule can substitute for it.
4. Use a Memory Sentence: The classic English teaching sentence “A rough-coated, dough-faced, thoughtful ploughman strode through the streets of Scarborough, coughing and hiccoughing thoughtfully” intentionally packs in most of the six sounds - reading it aloud slowly is a genuinely useful drill.
5. Related Practice: Our guide to -ED endings in English covers a different but equally rule-based sound pattern, and the -S and -ES endings guide rounds out the set of English's three most useful sound-pattern rules.

Frequently Asked Questions

How many ways can -ough be pronounced in English?

At least six major pronunciations are in common use: /uː/ (through), /ɔː/ (thought), /oʊ/ (though), /ʌf/ (tough), /ɒf/ (cough), and /aʊ/ (bough). Some linguists count additional rare variants in less common words, but these six cover essentially all everyday -ough vocabulary.

Is there any rule to predict which -ough sound a word uses?

No reliable rule exists based on spelling alone. The variation is a historical accident from an older consonant sound (/x/) disappearing differently in different words over several centuries, after English spelling had already been frozen by early printing. Each word must be learned individually.

Why is GH sometimes pronounced as F, like in “tough”?

In Old and Middle English, GH represented a guttural throat sound (/x/), similar to the “ch” in the Scottish word “loch.” In certain words, that sound hardened into the acoustically similar /f/ instead of disappearing entirely, which is why “tough,” “cough,” “rough,” and “enough” all end in an F sound today.

Do British and American English pronounce -ough words the same way?

The same six-way sound split exists in both varieties, though the exact vowel quality can differ slightly - British English tends to use a fuller, more rounded vowel in words like “cough” and “thought” than General American English does.

Quick Recap

1. -OUGH has at least six different pronunciations: through /uː/, thought /ɔː/, though /oʊ/, tough /ʌf/, cough /ɒf/, and bough /aʊ/.
2. GH is silent in four of the six patterns and becomes an /f/ sound in exactly two: tough-type and cough-type words.
3. The variety exists because an older guttural sound (/x/) disappeared unevenly across words after English spelling was already frozen by early printing.
4. There is no spelling rule to predict the sound - each -ough word must be learned individually, like a small irregular vocabulary set.

Use the practice tool above to check your pronunciation of each -ough word with real audio feedback, and come back to this list any time a new -ough word catches you off guard. Happy practicing!