Webster's Revised Unabridged Dictionary · 1913

Dissonant

Dissonant , adjective

[Latin dissonans, -antis, present participle of dissonare to disagree in sound, be discordant; dis- + sonare to sound: compare French dissonant. See Sonant.]

1.
Sounding harshly; discordant; unharmonious.
With clamor of voices dissonant and loud. — Longfellow
2.
Disagreeing; incongruous; discrepant, -- with from or to.
Anything dissonant to truth. — South
What can be dissonant from reason and nature than that a man, naturally inclined to clemency, should show himself unkind and inhuman? — Hakewill