to try to achieve something impossible
不可能なことを達成しようとする (fukanōna koto o tassei shiyō to suru)
"Stop chasing rainbows and focus on reality."
"虹を追いかけるのをやめて、現実に集中してください。" (**Niji o oikakeru** no o yamete, genjitsu ni shūchū shite kudasai.)
to settle and become established somewhere
to make something possible or likely to happen later
fixed and unchangeable
a report confirming good health
to take responsibility for something difficult
sometimes it's okay to ignore rules