to make unrealistic plans or dreams
非現実的な計画や夢を描くこと (higenjitsutekina keikaku ya yume o egaku koto)
"He’s always building castles in the air instead of acting."
"彼は行動する代わりにいつも空想ばかりしている。" (kare wa koudou suru kawari ni itsumo kuusou bakari shite iru)
to suddenly realize the solution to a problem
a casual way of asking how someone is doing
to be completely absorbed in what you’re doing
strong feeling of envy
to betray someone after pretending to support them
in a safe or stable situation