The Collaborative International Dictionary of English v.0.48:
Unharmonious \Un`har*mo"ni*ous\, a. Inharmonious; unsymmetrical; also, unmusical; discordant. --Swift. -- Un`har*mo"ni*ous*ly, adv. [1913 Webster]WordNet (r) 3.0 (2006):
unharmonious adj 1: not in harmony [syn: inharmonious, unharmonious] [ant: harmonious]