1. Ostentatiously lofty in style
   - bombastic, declamatory, large, tumid, turgid 
2. (of sounds) full and rich
   "orotund tones"
   - rotund, round, pear-shaped

See also: full, rhetorical

• unmechanized
• unmediated
• unmedical
• unmedicative
• unmedicinal
• unmelodic
• unmelodious
• unmelodiously
• unmelted
• unmemorable
• unmemorably
• unmentionable
• unmercenary
• unmerchantable
• unmerciful
• unmercifully
• unmercifulness
• unmerited
• unmeritorious
• unmet
• unmethodical
• unmilitary
• unmindful
• unmindfully
• unmindfulness