The vowel in "bath": American /æ/ vs British /ɑː/
Americans say “bath” with the same short vowel as “cat”, /æ/; standard British English uses the long vowel of “father”, /ɑː/. Linguists call this the trap–bath split. It changes some of the most common words in English, such as “can’t”, “ask” and “last”, so it is one of the first things listeners notice.
All audio on this page is an AI voice (neural text-to-speech), one American and one British.
Which words change their vowel?
In standard British English (Received Pronunciation), many words spelled with an “a” before f, s, th, or n plus another consonant take the long /ɑː/. In American English, the same words keep the short /æ/ of “trap” and “cat”.
| Word | American | British |
|---|---|---|
| bath | /bæθ/ | /bɑːθ/ |
| dance | /dæns/ | /dɑːns/ |
| last | /læst/ | /lɑːst/ |
| ask | /æsk/ | /ɑːsk/ |
| can’t | /kænt/ | /kɑːnt/ |
bath American: British:
dance American: British:
last American: British:
ask American: British:
can’t American: British:
Listen to the middle of each word. The American vowel is short and front, with the mouth wide. The British vowel is long and further back, with the jaw lower.
The rule has exceptions. In British English, “cat”, “gas”, “mass” and “and” keep the short vowel, and so do many longer words such as “classic”. The split is also regional: speakers in the north of England say “bath” with a short vowel, like Americans, but with a more open /a/.
Hear it in a sentence
“I can’t ask for a glass.” has three words with the bath vowel: can’t, ask and glass.
American: British:
The American voice keeps one short vowel in all three words. The British voice lengthens all three.
What a scorer hears
We scored both AI voices against the American English scoring accent. We used the same scoring engine and settings that AnyAccent uses in the app. For American English, the scorer grades each sound and also names the sound it heard.
Example result: single words, scored as American English
| Word | American AI voice | British AI voice | Sound the scorer heard in the British voice |
|---|---|---|---|
| bath | 100 | 98 | /ɑ/ |
| last | 100 | 100 | /ɑ/ |
| can’t | 100 | 98 | /ɑ/ |
How to read this:
- In “bath”, “last” and “can’t”, the American scorer named the British vowel /ɑ/, not /æ/. It heard the difference.
- It did not take points away for it. Both voices scored 98 or more on every word.
- For “dance”, “ask” and “glass”, the scorer still named the British vowel /æ/. Its labels are its best match, not a full transcription, so treat them as a hint.
- On the full sentence, both voices scored over 94 against American English, and 100 against British English.
This is a difference that listeners notice more than the scorer penalizes. Choose the vowel for the accent you want, and keep it the same in every word of the group.
The scores above are from single runs on AI voices. Your own scores will depend on your recording.
How to practise it
For the American /æ/
- Spread your lips slightly and drop your jaw halfway.
- Push the tongue forward and keep it low, as in “cat”.
- Keep the vowel short: “bath” is one quick beat.
- Drill pairs where both words take /æ/ in American English: “cat / can’t”, “pass / past”, “has / half”.
For the British /ɑː/
- Drop your jaw lower and pull the tongue back, as in “father” and “car”.
- Make the vowel long: hold it about twice as long as the vowel in “cat”.
- Learn the words as a set: bath, path, last, past, fast, ask, task, dance, chance, can’t, half, after, glass, class.
- Check the exceptions out loud: “gas”, “mass”, “cat” stay short.
Common questions
Is “bahth” or “bath” correct?
Both are correct. The long /ɑː/ is standard in southern British English, and the short /æ/ is standard in American English and in the north of England.
Do all British speakers say “bahth”?
No. Most speakers in the north of England and the Midlands use a short vowel in “bath”. The long vowel belongs mainly to the south of England and to Received Pronunciation.
Does “can’t” change too?
Yes. Americans say /kænt/, and standard British English says /kɑːnt/. Because “can” keeps the short vowel in both accents, British speakers use the vowel to tell “can” and “can’t” apart.
Practise with a scorer
AnyAccent lets you pick the accent you practise against. For American English, you get sound-level diagnosis: the app names the sound you missed. For British English, you get word and sentence scores.
See the full sound guides for American English and British English, and read about the R in “car”.