time / hour / the hours or time when something happens

difficult / hard, probably impossible

think / meditate / consider / expect / reflect / prepare / make up one's mind / imagine / contrive

needed, necessary

need, necessity

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

timetable

to address someone, to direct, to do (something to someone) / to be about to, to begin / in the middle of, to begin (not complete)

成り掛ける: to be on the verge, to be on the brink.

賭け: gambling, betting / 掛: credit / soba served in a hot soup