劳其筋骨 láo qí jīn gǔ

DEFINITIONS

  1. toils their muscles and bones; from the idiom, meaning to physically challenge someone as part of a greater preparation process

CHARACTERS

劳 láo labor, toil, do manual work
其 qí his, her, its, their; that
筋 jīn muscles; tendons
骨 gǔ bone; skeleton; frame, framework