How To Pronounce Sub

In British English, sub is pronounced /sʌb/. The narrow phonetic transcription is [sʌb̚]. In American English, it is pronounced /sʌb/.

Sub has one syllable. British and American speakers say it the same way.

Slashes / / show the phonemic transcription, the sounds that change meaning. Square brackets [ ] show the phonetic transcription, with the finer detail of how the sounds are actually made.