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adj.
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"
adj.
happening by chance or unexpectedly or unintentionally ; "with an inadvertent gesture she swept the vase off the table"; "accidental poisoning"; "an accidental shooting"
adj.
so remarkably different or sudden as to cause momentary shock or alarm; "Sydney's startling new Opera House"; "startling news"; "startling earthquake shocks"
adj.
characterized by often poignant difference or incongruity between what is expected and what actually is; "madness, an ironic fate for such a clear thinker"; "it was ironical that the well-planned scheme failed so completely"