1. Having a projecting lower jaw
   - prognathous, prognathic

See also: lantern-jawed

• unarm
• unarmed
• unarmored
• unarmoured
• unarticulate
• unarticulated
• unartistic
• unary
• unary operation
• unascertainable
• unascribable
• unashamed
• unashamedly
• unasked
• unaspiring
• unassailable
• unassailably
• unassertive
• unassertively
• unassertiveness
• unassignable
• unassigned
• unassisted
• unassuming
• unassumingly