foreign vs unfamiliar

foreign and unfamiliar both are adjectives.

Word	Noun	Adjective	Verb	Adverb
foreign	No	Yes	No	No
unfamiliar	No	Yes	No	No

foreign (adjective)	unfamiliar (adjective)
relating to or originating in or characteristic of another place or part of the world	not known or well known
of concern to or concerning the affairs of other nations (other than your own)
not belonging to that in which it is contained; introduced from an outside source
not contained in or deriving from the essential nature of something