- innocent of, unacquainted with - not knowledgeable about something specified; "American tourists wholly innocent of French"; "a person unacquainted with our customs"
Antonym: informed (indirect, via uninformed)
- unacquainted, unacquainted with, unfamiliar with - having little or no knowledge of; "unacquainted with city ways"
Antonym: familiar (indirect, via unfamiliar)