sudden

 
Pronunciation: /ˈsʌd(ə)n/

adjective

  • occurring or done quickly and unexpectedly or without warning: a sudden bright flash

adverb

literary or informal
  • suddenly: sudden there swooped an eagle downward

Phrases

(all) of a sudden

suddenly: I feel really tired all of a sudden

on a sudden

archaic way of saying all of a sudden.

Derivatives

suddenness

Pronunciation: /-d(ə)nnɪs/
noun

Origin:

Middle English: from Anglo-Norman French sudein, from an alteration of Latin subitaneus, from subitus 'sudden'