鞠躬尽力

jū gōng jìn lì

to bend to a task and spare no effort (idiom); striving to the utmost

same as 鞠躬盡瘁|鞠躬尽瘁[ju1 gong1 jin4 cui4]

鞠

jū

to incline (one's torso); to bow

躬

gōng

(literary) body (of a human, esp. the torso)

尽

jìn

to use up

力

lì

power