(product development) project

diligent; industrious

diligence, assiduity, industry.

project (planned endeavour)

to work at a job, to labour / to work properly, to operate, to function; to carry out one's function, to be effective, to come into play / to perpetrate or commit a crime

Alternative spelling of 只働き

Alternative spelling of 只働き

success / success in life, achievement in the world

succeed / be successful in life

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend