Adverbs for Sudden

unforgivably; dangerously; unreasonably; lamentably; unintentionally; abruptly; breathlessly; unpardonably; precipitately; prematurely; rudely; unfortunately; startlingly; whimsically; intentionally; astonishingly; mercifully; shockingly; amusingly; disconcertingly; ridiculously; laughably; offensively; inexcusably.