not known or identified
obscure, mysterious
Cases of word usage
1) (used of a lifeless thing, or of an animal or a baby when the sex is unknown or unimportant) the thing mentioned (it)
2) having an unknown name; too bad to be named (nameless)
3) a hidden, unknown or unexpected difficulty (snag)
4) in some way (or other); by one means or another; because of an unknown reason (somehow)
5) a thing, reason, event etc that is unknown (something)
6) an unknown point in time (sometime)
7) a person who makes a voyage (especially a person who in former times explored unknown seas) (voyager)
