一动不动

一動不動
yīdòngbùdòng
motionless

CEDICT

Entry Composition

1 一 yī
  1. one
  2. single
  3. a (article)
  4. as soon as
  5. entire; whole; all; throughout
  6. "one" radical in Chinese characters (Kangxi radical 1)
  7. also pr. yāo for greater clarity when spelling out numbers digit by digit
2 动不动 dòngbudòng
  1. (typically followed by 就 jiù) apt to (lose one's temper, catch a cold etc)
  2. at the drop of a hat