How To Pronounce Invalid

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

Noun. It is /ˈɪn.və.lɪd/ in British English and /ˈɪn.və.lɪd/ in American English with the main stress on the first syllable, as in “an invalid”.

Adjective. It is /ɪnˈvæl.ɪd/ in British English and /ɪnˈvæl.ɪd/ in American English with the main stress on the second syllable, as in “an invalid ticket”.

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.