worry, agonize, be troubled
これから悩むことになりそうだ。
I think I'm going to have something to worry about from now on.
もう何があってもこれでソファ選びに悩む事はない
No matter what happens, I’ll never have to worry about choosing a sofa again.
— ファイト・クラブ (1999)
恋に悩むのも青春の魔力
Even agonizing over love is part of the magic of youth.
— 暗殺の森 (1971)
彼女のことでそんなに真剣に悩む必要はなかったのに。
You didn't have to worry so much about her.
そのことで悩むな。
Don't worry about it.
なぜ悩むんだよ
Why are you worrying about it?
— いまを生きる (1989)