冷不丁

lěngbùdīng
  1. (colloquial) suddenly; unexpectedly
  2. suddenly; unexpectedly

Wiktionary

Homographs

冷不丁 lěngbudīng
  1. suddenly
  2. by surprise

Entry Composition

=1 冷 Lěng surname Leng
=1 冷 lěng cold
=1 冷 líng only used in 冷凙／冷𪞝
=1 冷 lǐng only used in 㓑冷
2 不 bù
  1. no; not so
  2. (bound form) not; un-
=3 丁 Dīng surname Ding
=3 丁 dīng
  1. male adult
  2. the 4th of the 10 Heavenly Stems 天干 tiāngān
  3. fourth (used like "4" or "D")
  4. small cube of meat or vegetable
  5. (literary) to encounter
  6. (archaic) ancient Chinese compass point: 195°
  7. (chemistry) butyl
=3 丁 zhēng used in 丁丁 zhēngzhēng