1. Socially incorrect in behaviour
   "resentment flared at such an unmannered intrusion"
   - ill-mannered, bad-mannered, rude, unmannerly 
2. Without artificiality; natural
   "the doctor's quiet unmannered entry"

See also: impolite, unaffected

• insightfulness
• insignia
• insignia of rank
• insignificance
• insignificant
• insignificantly
• insincere
• insincerely
• insincerity
• insinuate
• insinuating
• insinuatingly
• insinuation
• insinuative
• insinuator
• insipid
• insipidity
• insipidly
• insipidness
• insist
• insistence
• insistency
• insistent
• insistently
• insisting