1. Lacking hair on the face
   "a smooth-faced boy of 14 years"
   - beardless

See also: hairless

• unbound
• unbounded
• unbounded interval
• unboundedness
• unbowed
• unbox
• unbrace
• unbraced
• unbraid
• unbrainwashed
• unbranched
• unbranching
• unbranded
• unbreakable
• unbreakableness
• unbridgeable
• unbridle
• unbridled
• unbroken
• unbrushed
• unbuckle
• unbundle
• unburden
• unburdened
• unburied