白首穷经 báishǒuqióngjīng to study until old age Origin Definitions Defs Strokes Stroke Words Sentences Sents 白首 báishǒu white hair (literary) hoary head; white-haired head穷 窮 qióng adjective to exhaust to use up; to exhaust; to pursue to the limit; to reach the end of something经 經 jīng nounadjective classic classic; scripture; sacred book; religious or authoritative canon