careless
あいつら本当に適当だな
Those guys are really careless.
— グエムル -漢江の怪物- (2006)
あの人たちの話ってすげえ適当だし
Those people are so full of it.
— 天気の子 (2019)
適当に答えたでしょう。
You just gave a careless answer, didn’t you?
彼はいつも適当だ。
He's always careless.