Sound!

dissonance
(n)
DISS-ǝ-nǝnce
Meaning

discord; lack of harmony; harsh, clashing, unharmonious sound

1st Sample Sentence

The cat leapt on the piano keyboard, producing a great crash of dissonance.

Root

dis (apart)#sonus (sound) (Latin)

Antonyms

euphony

Mnemonics

Dissonance is opposite of resonance, which is cacophonous, discordant. dis-sonance::DIS RESONANCE--not resonant. so not in harmony