How To Pronounce Cube

In British English, cube is pronounced /kjuːb/. The narrow phonetic transcription is [kj̥ʷuːb̚]. In American English, it is pronounced /kjuːb/.

Cube 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.