dissonant (adj) – discordant or cacophonous; incongruous or out of agreement (also absonant)
BREAKDOWN: DIS- (apart) + SON- (sound) + -ANT (state or quality)
— dissonance is inharmonious sound or cacophony; an incongruity or disagreement
This word is built on the root SON-, which means sound.
Common SON- words include sonar, sonic, and sound.
More esoteric SON- words include assonant, sonata, soniferous, and sonnet.