|a.||1.||Happening without previous notice or with very brief notice; coming unexpectedly, or without the common preparation; immediate; instant; speedy.|
|2.||Hastly prepared or employed; quick; rapid.|
Never was such a sudden scholar made.
|3.||Hasty; violent; rash; precipitate.|
|n.||1.||An unexpected occurrence; a surprise.|
|Adj.||1.||sudden - happening without warning or in a short space of time; "a sudden storm"; "a sudden decision"; "a sudden cure"|
gradual - proceeding in small stages; "a gradual increase in prices"