[adj] not expected or anticipated; "unexpected guests"; "unexpected news"
[adj] happening or coming quickly and without warning; "a sudden unexpected development"
[adj] not planned; "an unexpected pregnancy"
[adj] causing surprise or amazement by not being expected; "the curtains opened to reveal a completely unexpected scene"
[adj] made necessary by an unexpected situation or emergency; "a forced landing"
[adj] not foreseen; "unsuspected difficulties arose"; "unsuspected turnings in the road"