This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Not being acquainted; not conversant: unfamiliar with the roads here.

adj. Not within one's knowledge; strange: unfamiliar faces.

adj. Strange, not familiar.

n. An unfamiliar person; a stranger.

Not familiar; not well known or acquainted; not wonted by frequent use.

adj. not known or well known

"These gentlemen were using a phrase unfamiliar to many in northern and eastern linguistic regions but easily understood by “country” talkers and especially black Americans; it is deeply rooted in the usages of some of the great contributors to the English language."

unacquainted    strange    unfamiliar with    unknown    unacquainted with   

familiar    common   

novel    new    unacquainted    inconversant    stranger    outlandish    bizarre   

familiar   

familiar    exotic    unpleasant    weird    unknown    harsh    distinctive    distant    frighten