一决高下

一決高下
yījuégāoxià

to compete against one another and determine who is superior

Wiktionary

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 决 jué
  1. to decide
  2. to determine
  3. to execute (sb)
  4. (of a dam etc) to breach or burst
  5. definitely
  6. certainly
3 高下 gāoxià relative superiority (better or worse, stronger or weaker, above or below etc)