Source : Webster's Revised Unabridged Dictionary (1913)

Unharmonious \Un`har*mo"ni*ous\, a.
   Inharmonious; unsymmetrical; also, unmusical; discordant.
   --Swift. -- {Un`har*mo"ni*ous*ly}, adv.

Source : WordNet®

unharmonious
     adj : not in harmony [syn: {inharmonious}] [ant: {harmonious}]