Sudden

Adjective

 * 1) Happening quickly and with little or no warning, snell.
 * The sudden drop in temperature left everyone cold and confused.

Antonyms

 * gradual
 * unsudden

Derived terms

 * all of a sudden
 * sudden death
 * suddenly
 * suddenness
 * suddenwoven

Adverb

 * 1)  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.

Thesaurus
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

Etymology
From sodain:, from  sodein:, from  sodain:, subdain:, from  *undefined:,  from  subitaneus:, from subitus:, originally the past participle of subire:, from sub: + ire:.

Adjective

 * Chinese: 突然的
 * Croatian:, ,
 * Czech:
 * Danish: ,
 * Dutch: ,
 * Esperanto: subita
 * Estonian: äkiline
 * Finnish: ,
 * French:, ,
 * German: ,
 * Greek:, ,
 * Italian: ,
 * Japanese: 突然の
 * Korean: 급격한


 * Lojban: suksa
 * Polish: nagły, nagła , nagłe
 * Portuguese: ,
 * Russian: неожиданный, неожиданная , неожиданное
 * Scottish Gaelic:, grad
 * Spanish:
 * Swahili:
 * Swedish:
 * Telugu: హఠాత్తుగా (haThaattugaa), అకస్మాత్తుగా (akasmaattugaa)
 * Turkish:
 * Ukrainian: наглий (nahlyj), раптовий (raptowyj) , несподіваний (nespodiwanyj)
 * Vietnamese: ,