unexpected, unforeseen, unanticipated, unforeseeable, unpredictable, catastrophic, unplanned, cataclysmic, inexplicable, unexplainable, unpreventable, abrupt, extraordinary, unpropitious, unavoidable, unprecedented, calamitous, exogenous, disastrous, unfathomable, dramatic, fortuitous, unpremeditated, unusual, astonishing, uncontrollable, unimagined, unknowable, sudden, adverse, bizarre, inevitable, unimaginable, fluky, implausible, synchronistic, improbable, serendipitous, gluon, unsuspected, unseasonal, undesired, unintended, momentous, atypical, foreseeable, untimely, predictable, unfavourable, bewildering, expectable, epochal, unordinary, precipitate, remediable, unmanageable, unsustained, undesigned, precipitous, astounding, miraculous, explainable, einsteinian, unapparent, startling, predicable, freakish, irrational, knowable, unlooked, unprepared, avoidable, indeterminable, illogical, manmade, unfortunate, tragic, unfathomed, surprising, ineluctable, unthinkable, incomprehensible, earthshaking, unseasonable, unthought, explicable, instable, mutational, drastic, unwelcome, unadvisable, remarkable, uncharacteristic, untoward, anthropic, unsettling, climatological, evitable, devastating, illusional, inexorable, uncontrolled, unforseen, anticipated, undesirable, detrimental, likely

unannounced, unexpected, unheralded