Not felt or realized beforehand; unexpected

unforeseen difficulties.

not anticipated; "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"[syn: unanticipated ]

adjective

expected , foreseen , predictable , predicted

adjective

abrupt , accidental , from left field , not bargained for , out of the blue * , startling , sudden , surprise , unanticipated , uncalculated , unexpected , unlooked-for , surprising , unimagined , unpredicted