Silent b pronunciation

The letter b is silent in English in two reliable places: at the end of a word after m, and in the small -bt group. The -mb ending is one of the most consistent silent-letter patterns in the language — if a word ends in mb, the b is virtually always silent, so comb is "coam" and thumb is "thum". The b was pronounced in Old English (the ancestor of climb was climban), and it dropped out of speech between the two consonants while the spelling kept it. It is a leftover, like the k in knee and the gh in night — see silent k and ghost consonants for the wider pattern.

Note how the silent b leaves the vowel to do all the work, which is why the vowel sounds vary so much across this list: comb, thumb, bomb and tomb do not rhyme with each other despite sharing the exact same ending. The b tells you nothing; the vowel must be learned with the word. bomb and tomb extend the pattern to ob and omb — the spellings ombe and omb simply follow the same rule.

tomb rhymes with room, not with bomb, and womb is pronounced exactly like "woom" — the o takes the /uː/ of food. Both keep the silent b of the -mb pattern but change the vowel, which makes them favourites in spelling bees and traps for anyone who has just learned that bomb is "bom". They are also homophones of common words: tomb/room pairs and womb/woom — the homophones guide lists more words whose spelling hides a familiar sound.

debt , doubt and subtle drop the b in the middle of the word. These are the famous "Renaissance insertions": the b was never pronounced in English — scholars added it to the spelling in the 1500s to advertise the Latin ancestors debitum and dubitare. The b in debt, like the s in island and the p in receipt, is a spelling that was inserted, not a sound that was lost — the opposite history from comb. Despite that, the effect is the same: say "det", "dowt" and "suttle".

Silent consonants often revive when a suffix reshapes the word. climber keeps the silent b, but crumble and bombard pronounce it — the b becomes audible when a vowel or a new syllable follows it directly. The same process works across the language: the g is silent in sign but pronounced in signature. So the rule is best stated positionally: b is silent after m at the end of a word or before t, and is usually restored when the word grows. Commonly mispronounced words also covers tomb and subtle, which top the learner error lists.

Not every mb spelling is silent-b territory. In member , number and remember the b is fully pronounced, because the m and b belong to different syllables (mem-ber, num-ber). The silent b occurs only when m and b form one final cluster — a useful diagnostic when you meet a new mb word. And combat , despite sharing the first four letters with comb, pronounces both consonants; it is a different word, from a different source, and only the ear can arbitrate.

Read slowly first. Pronounce each syllable deliberately before trying to blend them at full speed. Rushing hides the vowel and consonant shapes your ear needs to learn.

Record yourself. Most phones have a voice memo app — record a word, then compare it to the playback here. Hearing the gap between your version and the model accent makes targeted practice far easier.

Focus on one accent. Jumping between American, British and Australian in the same session creates confusion. Pick the accent you encounter most and stick with it until the patterns feel natural.

Every word above is a button. Set the accent and voice you want on the main screen, then come back — the guides use whatever you chose. To hear two accents against each other, use Compare; to test whether you can actually hear a contrast, use the listening quiz.