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

• heterosis
• Heterosomata
• heterosporous
• heterospory
• heterostracan
• Heterostraci
• heterotaxy
• Heterotheca
• Heterotheca villosa
• heterothermic
• Heterotrichales
• heterotroph
• heterotrophic
• heterozygosity
• heterozygote
• heterozygous
• heth
• hetman
• Heuchera
• Heuchera americana
• Heuchera cylindrica
• Heuchera sanguinea
• heulandite
• heuristic
• heuristic program