Synonyms: unanticipated, unforeseen, unlooked-for, out of the blue
Definition: not anticipated
Usage: unanticipated and disconcerting lines of development- H.W.Glidden; unforeseen circumstances; a virtue unlooked-for in people so full of energy; like a bolt out of the blue
Similar words: unexpected
Definition: not expected or anticipated
Usage: unexpected guests; unexpected news