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discord

noun

lack of concord or harmony between persons or things: marital discord.
disagreement; difference of opinion.
strife; dispute; war.
Music. an inharmonious combination of musical tones sounded together.
any confused or harsh noise; dissonance.

verb (used without object)

to disagree; be at variance.

noun (ˈdɪskɔːd)

lack of agreement of harmony; strife
harsh confused mingling of sounds
a combination of musical notes containing one or more dissonant intervalsSee dissonance (def. 3), concord (def. 4)

verb (dɪsˈkɔːd)

(intr) to disagree; clash

early 13c., descorde, “unfriendly feeling, ill will;” also “dissention, strife,” from Old French descorde (12c.) “disagreement,” from Latin discordia, from discors (genitive discordis) “disagreeing, disagreement,” from dis- “apart” (see dis-) + cor (genitive cordis) “heart” (see heart). Musical sense is late 14c.

c.1300, from Old French discorder (13c.), from Latin discordare (see discord (n.)).