- Happening quickly and with little or no warning, snell.
- The sudden drop in temperature left everyone cold and confused.
- (poetic) Suddenly.
Adverbs for Sudden
rudely; unfortunately; startlingly; whimsically; intentionally; astonishingly; mercifully; shockingly; amusingly; disconcertingly; ridiculously; laughably; offensively; inexcusably; unforgivably; dangerously; unreasonably; lamentably; unintentionally; abruptly; breathlessly; unpardonably; precipitately; prematurely.
aback, abrupt, abruptly, accelerated, breakneck, breathless, brisk, electrifying, expeditious, extraordinary, fast, fleet, forthwith, hasty, headlong, hurried, immediate, impatient, impetuous, improbable, impulsive, more than expected, nerve-shattering, out-of-the-way, overhasty, panting, past expectation, precipitant, precipitate, precipitous, quick, rapid, rash, reckless, rushing, shocking, short, speedy, startling, suddenly, surprising, swift, unannounced, unanticipated, unanticipatedly, unaware, undivined, unexpected, unexpectedly, unforeseeable, unforeseen, unguessed, unheralded, unhoped for, unlooked-for, unpredictable, unpredicted, unprepared for, unwonted, without warning
From Middle English sodain, from Anglo-Norman sodein, from Old French sodain, subdain (“immediate, sudden”), from Vulgar Latin *subitānus (“sudden”), from Latin subitaneus (“sudden”), from subitus (“sudden", literally, "that which has come stealthily”), originally the past participle of subire (“to come or go stealthily”), from sub (“under”) + ire (“go”).