Discord

Want of concord or agreement; absence of unity or harmony in sentiment or action; variance leading to contention and strife; disagreement; -- applied to persons or to things, and to thoughts, feelings, or purposes.

Union of musical sounds which strikes the ear harshly or disagreeably, owing to the incommensurability of the vibrations which they produce; want of musical concord or harmony; a chord demanding resolution into a concord.

To disagree; to be discordant; to jar; to clash; not to suit.

strife resulting from a lack of agreement

disagreement among those expected to cooperate