jìn​xīn​jìn​lì

strive

尽心尽力 (盡心盡力) jìn​xīn​jìn​lì
strive idiom
to make an all-out effort; to do one's utmost with heart and soul

He dedicated himself heart and soul to this work and never complained.

Frequency

Movie subtitles
1.85 per million appears in 1% of films
Written text
1.44 per million

Sources

Definitions
CC-CEDICT