1. Not having a musical sound or pleasing tune
   - tuneless, untuneful 
2. Lacking melody
   - unmelodic, unmusical

See also: unmelodiously

Antonym: melodious

• unadaptable
• unadapted
• unaddicted
• unaddressed
• unadjustable
• unadjusted
• unadmonished
• unadoptable
• unadorned
• unadulterated
• unadventurous
• unadvisable
• unadvised
• unadvisedly
• unaerated
• unaesthetic
• unaffected
• unaffectedly
• unaffectedness
• unaffecting
• unaffectionate
• unaffiliated
• unaffixed
• unaffordable
• unaffordablity