IPA: /ɪnˈhɑːrmənɪk/
KK: /ɪnˈhɑːrmənɪk/
Not having a pleasing sound; producing a harsh or discordant effect.
The inharmonic tones created an unsettling atmosphere in the music.
Comparative: more inharmonic
Superlative: most inharmonic
Inharmonic → It is formed from "in-" (meaning not) and "harmonic" (from Greek "harmonikos", meaning relating to harmony). The word "inharmonic" describes something that is not harmonious or lacks harmony.
Think of 'not' ('in-') being combined with 'harmonious' ('harmonic') to remember that 'inharmonic' means lacking harmony.