Listening and pronunciation

Silent letters in English: patterns, examples and why they exist

Updated: October 3, 2026

Silent letters in English are letters you write but do not say, like the k in know or the b in climb. They are one reason English spelling feels unfair: you hear /naɪf/ and have to write knife. The good news is that most silent letters follow a small number of patterns. This post groups them by letter, shows the real pronunciation with IPA, explains where they came from, and gives you a short routine for dictation and spelling practice.

The most common patterns

You do not need a list of hundreds of words. A few spelling patterns cover most of the silent letters you will meet at A2 and B1 level. When you see one of these patterns, expect a silent letter.

• kn- at the start of a word: the k is silent. know /nəʊ/, knife /naɪf/, knee /niː/, knowledge /ˈnɒlɪdʒ/.
• wr- at the start of a word: the w is silent. write /raɪt/, wrong /rɒŋ/, wrist /rɪst/, wrap /ræp/.
• -mb at the end of a word: the b is silent. climb /klaɪm/, comb /kəʊm/, thumb /θʌm/, lamb /læm/. It stays silent when you add an ending: climber /ˈklaɪmə/, plumber /ˈplʌmə/.
• -alk, -alf, -alm, -ould: the l is usually silent. walk /wɔːk/, talk, half /hɑːf/, calm /kɑːm/, could /kʊd/, should, would. In some American speech the l in calm and palm can be heard.
• -igh and -ought/-aught: the gh is silent. night /naɪt/, light, daughter /ˈdɔːtə/, thought.
• -sten, -stle: the t is silent. listen /ˈlɪsən/, fasten /ˈfɑːsən/, castle /ˈkɑːsəl/, whistle /ˈwɪsəl/.

Silent letters by letter: a reference table

The pronunciations below are British English as given by Cambridge Dictionary. American English uses the same silent letters, with some vowel differences.

• I know the answer, but I can't write it down.

  Three silent letters: k in know, w in answer, w in write.

• We waited half an hour for the castle to open.

  Silent l in half, h in hour, t in castle.

• She climbed the hill on a calm autumn night.

  Silent b, l, n and gh. Say it aloud, then write it from memory.

Why does English have silent letters?

There are three main reasons, and they help you remember the words.

1. The sound changed, the spelling did not. The k in know and knight was once pronounced. The Online Etymology Dictionary says the kn- sound weakened for about a century and became plain n- in standard English by about 1750. English spelling had mostly settled before changes like this finished, so the old letter stayed.
2. Scholars added letters to show Latin roots. English borrowed doubt and debt from French without a b. Between the 14th and 16th centuries, writers added the b to make the words look like Latin dubitare and debitum. Nobody ever pronounced it in English. The s in island is a similar story: it was added in the late 1500s because people linked the word with the unrelated word isle.
3. Borrowed words kept their foreign spelling. Hour came through French from Latin hora, and its h has been silent since Roman times. Psychology keeps the Greek ps- spelling, but English speakers do not say the p.

Why silent letters matter for dictation and spelling

In listening, silent letters are not a problem: you simply do not hear them. They become a problem the moment you have to write what you heard. That is exactly what happens in a dictation, in note-taking, and in the IELTS Listening test, where IDP IELTS states that an answer with incorrect spelling is marked wrong. You can understand Wednesday perfectly and still lose the mark for writing “Wensday”.

Silent letters also create words that sound the same but are spelled differently. In a dictation, context is the only way to choose the right one.

A short practice routine

1. Learn by pattern, not by word. Take one pattern a day (kn-, wr-, -mb, silent l) and collect five words for it.
2. Say the word, then spell it aloud. Say /naɪf/, then “k-n-i-f-e”. Saying the silent letter as a letter name helps your memory.
3. Write from audio. Listen to short sentences that contain your five words and write them. In Typeflu you hear a natural sentence, type it word by word and fix each mistake letter by letter, so a missing k or w is marked on the exact letter.
4. Review your misses. Keep a list of words you misspelled and test yourself again after one day, three days and a week.
5. Check homophones in context. When you write know or no, write or right, read the whole sentence again and ask which one makes sense.

For IELTS learners, our post on IELTS Listening spelling lists other words that cost marks, and why spoken English is hard explains the sounds you do hear but do not expect.

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