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®

unharmoniously
     adv : in a discordant manner; "the piece ended discordantly" [syn:
            {discordantly}]