Словарь синонимов английского языка - unpremeditated

(adj) unprepared, unplanned, unarranged, uncontrived, unstudied, coincidental, spontaneous, spur-of-the-moment, last-minute, impromptu, extemporaneous or extemporary, extempore, ad lib, offhand, casual, impulsive, natural, involuntaby, automatic, unconscious, Colloq off the cuff: I had no inkling of her plans, so my running into her was entirely unpremeditated. Her immediate, unpremeditated reaction gas to run away.