expected

unforeseen, unanticipated, unpredicted, unusual, surprising, abrupt, unplanned, unwelcome, extraordinary, inexplicable, unforeseeable, unintended, sudden, dramatic, startling, unsuspected, serendipitous, unsettling, unlooked, unpredictable, untimely, unprecedented, unpleasant, fortuitous, uncharacteristic, improbable, unexplainable, atypical, undesired, astonishing, shocking, embarrassing, astounding, strange, unavoidable, unscheduled, bizarre, odd, unexplained, inevitable, unsurprising, unordinary, bewildering, predictable, jarring, stunning, unnerving, untoward, perplexing, miraculous, unfathomable, momentary, puzzling, incredible, unlikely, unheralded, unimaginable, momentous, impending, earthshaking, impromptu, anticipated, intriguing, unrelated, providential, overwhelming, notable, offbeat, baffling, inauspicious, noteworthy, mysterious, remarkable, ominous, worrisome, unpremeditated, huge, enormous, inadvertent, unfortunate, amazing, inopportune, peculiar, unorthodox, unaccustomed, unintentional, unconventional, accidental, unfathomed, disappointing, implausible, hefty, epochal, significant, disconcerting, ungraceful, apparent, monumental, unprepared, unrepeatable, oddball, unfamiliar, unforseen, unlookedfor, expectable, foreseeable, opportune, disturbing, likely

., abrupt, aftereffect, attack, backfire, backlash, blizzard, booby trap, break, by-product, byproduct, cot death, crib death, disjunct, encounter, even, extrusion, failure, fairy godmother, flashback, forced, fortunate, galvanization, good luck, gracious, happy chance, infant death, inquest, isolated, jumping, meeting, overturn, peripeteia, peripetia, peripety, pitfall, potluck, precipitation, rash, serendipitous, serendipity, sideslip, sids, sinking, skid, sleeper, slip, startle reaction, startle response, strange, stunner, success, sucker punch, sudden infant death syndrome, supervene, surprise, surprisingness, switcheroo, unexpectedness, unhoped, unhoped-for, unthought, unthought-of, unusual, upset, upseta, upsetter, vagary

out of the blue, unannounced, unlooked-for, unprovided for