毕力 (bì lì) is a formal literary verb meaning 'to exert oneself fully' or 'to spare no effort'. The character 毕 (bì) means 'to complete' or 'to exhaust', while 力 (lì) means 'strength' or 'effort'; together, they convey the idea of exhausting one’s entire strength to accomplish something. This term carries a strong connotation of dedication, perseverance, and wholehearted commitment.

It is commonly used in written Chinese—especially in essays, speeches, official documents, or motivational contexts—and less frequent in casual spoken conversation. 毕力 often appears with verbs like 投入 (tou1ru4, 'to devote'), 贡献 (gong4xian4, 'to contribute'), or 奋斗 (fen4dou4, 'to strive'), and typically modifies actions requiring sustained intensity and moral resolve, such as studying, serving society, or overcoming hardship.