Pronunciation · Words with silent letters

How to pronounce “castle”

KAH-sul

2 syllables · stress on “KAH”

KAHsul

Britishˈkɑːsl

Americanˈkæsl

In short

“castle” is pronounced KAH-sul: 2 syllables, with the stress on “KAH”. English drops the t in the -stle ending across the board: castle, whistle, listen, fasten, hustle. The rule is regular, but nothing in the spelling announces it. The version to avoid is KAS-tul — sounding the t.

Say “castle” in 3 steps

1The t is silent: KAH-sul.
2End on a syllabic l with no vowel before it.
3The same rule covers whistle, thistle, listen, glisten and fasten.

The version to avoid

Commonly said as: KAS-tul — sounding the t

English drops the t in the -stle ending across the board: castle, whistle, listen, fasten, hustle. The rule is regular, but nothing in the spelling announces it.

Hear real people say it

Model audio is consistent; real speech is not. Hearing several actual speakers is what makes a word recognisable when someone says it at full speed.

Real speakers

2 human recordings

Actual people saying “castle”, not a synthetic voice. Real speech varies — that variation is what you need to recognise, and what a single model voice cannot show you.

Recordings from Wikimedia Commons by Dvortygirl and Commander Keane, licensed under CC BY-SA 3.0 / CC BY-SA 4.0. Full credits.

Practise it out loud

Reading about a sound does not change your mouth. Say it, hear it back, and fix one thing at a time.

Say it yourself

0/6 practised

Listen first, then record. You get feedback on the individual sounds, the stress and the rhythm — no account needed, and nothing is stored.

Three speakers per accent

Recordings are used only to generate this feedback and are not stored. Your accent is never penalised: IELTS scores intelligibility, and so do we.

British vs American

British English uses the long /ɑː/ of “father”; most American speakers use the /æ/ of “cat”.

The sounds inside this word

Each links to a full guide with mouth position, audio and drills. If a word keeps failing, the problem is usually one of these.

kk as in key ɑːar as in car ss as in see ll as in light

Don't confuse it with…

Minimal pairs isolate the exact contrast this word depends on — the fastest way to train both ear and mouth.

/æ/ vs /ɑː/: cat vs cart

More words with silent letters

Same pattern, same fix. Learning them as a group is far faster than one at a time.

WednesdayWENZ-day subtleSUT-ul receiptrih-SEET salmonSAM-un islandEYE-lund debtDET

Frequently asked questions

How do you pronounce castle?

castle is pronounced KAH-sul, written /ˈkɑːsl/ in IPA. The t is silent: KAH-sul.

How many syllables are in castle?

two: KAH-sul. The stress falls on “KAH”.

What is the most common mistake with castle?

KAS-tul — sounding the t. English drops the t in the -stle ending across the board: castle, whistle, listen, fasten, hustle. The rule is regular, but nothing in the spelling announces it.

Is castle pronounced differently in British and American English?

British English uses the long /ɑː/ of “father”; most American speakers use the /æ/ of “cat”. IELTS accepts either accent, so choose one model and stay consistent.

The full sound library

Next step

Find every word you're getting wrong

SpeakMetry's Pronunciation Coach scores your speech on the features IELTS examiners assess — individual sounds, word and sentence stress, intonation and rhythm — and builds a plan from your weakest sounds. Free to start.

Try the Pronunciation Coach free