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

• friedcake
• Friedman
• Friedman test
• Friedreich's ataxia
• Friedrich Anton Mesmer
• Friedrich August Kekule
• Friedrich August Kekule von Stradonitz
• Friedrich August von Hayek
• Friedrich August Wolf
• Friedrich Engels
• Friedrich Froebel
• Friedrich Gottlieb Klopstock
• Friedrich Hebbel
• Friedrich Krupp
• Friedrich Max Muller
• Holcus lanatus
• Holcus mollis
• hold
• hold back
• hold close
• hold dear
• hold firm
• hold forth
• hold in
• hold it