智窮力竭

智穷力竭
zhìqiónglìjié

at a loss as to what to do; at one's wits' end; at the end of one's rope (both mentally and physically)

Wiktionary

Entry Composition

1 智 zhì (literary) wise; wisdom
2 窮 qióng
  1. poor
  2. destitute
  3. to use up
  4. to exhaust
  5. thoroughly
  6. extremely
  7. (coll.) persistently and pointlessly
3 力竭 lìjié
  1. (literary) to exhaust one's strength; to use up one's energy
  2. to exhaust one's strength; to use up one's energy