努

effort

to endeavor (to do)

as much as possible

untiring labor (labour)

hard worker

diplomatic efforts

business efforts

self-help efforts

prize awarded for good effort

management effort

never

obligation to make a sincere effort (to follow a set of rules, etc.)

goal to strive for

certainly

after efforts in vain

fruit of one's labor

try one's best

making strenuous efforts

making strenuous efforts