S: (adj) nameless, unidentified, unknown, unnamed (being or having an unknown or unnamed source) "a poem by an unknown author"; "corporations responsible to nameless owners"; "an unnamed donor"
S: (adj) unknown (not known to exist) "things obscurely felt surged up from unknown depths"
S: (adj) obscure, unknown, unsung (not famous or acclaimed) "an obscure family"; "unsung heroes of the war"
S: (adj) strange, unknown (not known before) "used many strange words"; "saw many strange faces in the crowd"; "don't let anyone unknown into the house"