1. Not knowledgeable about something specified
   "a person unacquainted with our customs"
   - innocent 
2. Having little or no knowledge of
   "unacquainted with city ways"
   - unacquainted with, unfamiliar with

See also: unfamiliar, uninformed

• stone parsley
• stone pine
• stone pit
• stone plant
• stone's throw
• stone-blind
• stone-broke
• stone-cold
• stone-dead
• stone-deaf
• stone-gray
• stone-grey
• stone-sober
• stonechat
• stonecress
• stonecrop
• stonecrop family
• stonecutter
• stoned
• stoneface
• stonefish
• stonefly
• Stonehenge
• stoneless
• stonelike