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

• large-leafed
• large-leaved
• large-leaved aster
• large-leaved cucumber tree
• large-leaved magnolia
• large-minded
• large-mouthed
• large-scale
• large-toothed aspen
• largehearted
• largeleaf holly
• largely
• largemouth
• largemouth bass
• largemouth black bass
• largemouthed bass
• largemouthed black bass
• largeness
• larger
• larger-than-life
• largess
• flux
• flux applicator
• flux density
• flux density unit