to work with total dedication and strive to the utmost, literally "to bend to the task until one is worn out"; often used in the phrase [[鞠躬尽瘁，死而后已|鞠躬盡瘁，死而後已|ju1 gong1 jin4 cui4 si3 er2 hou4 yi3]]

to bend to a task and strive to the utmost; to work with total devotion

to devote oneself entirely to a cause with the utmost effort until the very end of one's life

(idiom) to work with total devotion and spare no effort until one's dying day; to spare no effort in the service of one's country or a cause until the day one dies; literally to bend to the task until worn out and only stop at death