discord (v.) Look up discord at Dictionary.com
c. 1300, from Old French discorder (13c.), from Latin discordare (see discord (n.)).
discord (n.) Look up discord at Dictionary.com
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," from PIE root *kerd- "heart" (see heart). Musical sense is late 14c.