careless

US /ˈker.ləs/
UK /ˈker.ləs/
"careless" picture
1.

不注意な, 軽率な, ずさんな

not giving enough attention and thought to what you are doing, with the result that you make mistakes, damage things, or cause harm to someone

:
It was careless of him to leave the door unlocked.
ドアの鍵を開けっ放しにするなんて、彼は不注意だった。
He made a careless mistake on the exam.
彼は試験で不注意な間違いを犯した。
2.

無頓着な, 無関心な, 気にしない

not concerned or worried about something

:
She was careless of the consequences of her actions.
彼女は自分の行動の結果に無頓着だった。
He seemed completely careless about his future.
彼は自分の将来について全く無頓着に見えた。