1. Having the form of a column
   "trees with columniform trunks"
   - columnar, columnlike

See also: columned

• somberness
• sombre
• unmatched
• unmated
• unmeaning
• unmeant
• unmeasurable
• unmeasured
• unmechanical
• unmechanised
• unmechanized
• unmediated
• unmedical
• unmedicative
• unmedicinal
• unmelodic
• unmelodious
• unmelodiously
• unmelted
• unmemorable
• unmemorably
• unmentionable
• unmercenary
• unmerchantable
• unmerciful