In British English, the phonetic symbol /ɑ:/ corresponds to the vowel sound in words like "art" and "ask". It is called a long vowel.
Some common words which practice the pronunciation of /ɑ:/ include the following:
- with "a": after - ask - bath - half - staff - task;
- with "ar": are - aren't - arm - art - bar - car - dark - farm - hard - harm - part - smart - star - start;
- others: aunt; heart; laugh;
- homophones: aren't/aunt