观衅伺隙 guān xìn sì xì

DEFINITIONS

  1. lit. to look for holes, and observe gaps (idiom)
  2. fig. to search out one's opponent's weak points
  3. to look for the Achilles' heel

CHARACTERS

观 guān see, observe, view; appearance
衅 xìn consecrate sacrificial vessels by smearing blood; rift
伺 sì serve, wait upon, attend; examine
隙 xì crack, split, fissure; grudge