(a.) Unharmonious; discordant.

absonant antagonistic antipathetic at cross-purposes at loggerheads at odds at variance at war atonal cacophonic cacophonous clashing colliding conflicting contradictory contrary cracked cranky cross diaphonic differing disaccordant disagreeable disagreeing disconsonant discordant discrepant disharmonic disproportionate dissentient dissident dissonant divergent flat grating harsh hostile immelodious immiscible inaccordant incompatible inharmonic inharmonious jangling jarring musicless negative nonmelodious off off-key off-tone out of accord out of pitch out of tone out of tune out of whack raucous repugnant sharp shrill sour strident tuneless uncongenial unharmonious unmelodious unmusical untunable untuned untuneful variant