How To Pronounce Supplement

The stress in supplement moves depending on how the word is used.

Noun. It is /ˈsʌp.lɪ.mənt/ in British English and /ˈsʌp.lə.mənt/ in American English with the main stress on the first syllable, as in “a supplement”.

Verb. It is /ˈsʌp.lɪ.ment/ in British English and /ˈsʌp.lə.ment/ in American English with the main stress on the first syllable, as in “to supplement”.

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.