Synonyms for unfamiliar

modified

1. Unacquainted

   not introduced, not associated, unknown, not on speaking terms, not versed in, not in the habit of, out of contact with; see also strange 2.

   Antonyms friendly*, intimate, acquainted.

2. Strange

   alien, outlandish, exotic, remote, foreign, unknown, novel, original, different, unusual, extraordinary, unaccustomed, unexplored, anomalous, uncommon.

   Antonyms common*, ordinary, usual.