凿壁偷光 záobìtōuguāng to study diligently Origin Definitions Defs Strokes Stroke Words Sentences Sents 凿 鑿 záo verb to chisel to chisel; to bore a hole; to dig or excavate壁 bì noun wall wall; partition偷 tōu adverb secretly secretly; stealthily; doing something behind people's backs without being noticed光 guāng noun light light; ray; beam of light