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

• soda niter
• soda pop
• soda water
• sodalist
• sodalite
• sodality
• sodbuster
• sodden
• sodding
• soddy
• sodium
• sodium benzoate
• sodium bicarbonate
• sodium bichromate
• sodium carbonate
• sodium carboxymethyl cellulose
• sodium chlorate
• sodium chloride
• sodium cyanide
• sodium dichromate
• sodium ethylmercurithiosalicylate
• sodium fluoride
• sodium hydride
• sodium hydrogen carbonate
• sodium hydroxide