careless
US /ˈker.ləs/
UK /ˈker.ləs/

1.
descuidado, negligente, desatento
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.
Foi descuidado da parte dele deixar a porta destrancada.
•
He made a careless mistake on the exam.
Ele cometeu um erro descuidado no exame.
2.
despreocupado, indiferente, desatento
not concerned or worried about something
:
•
She was careless of the consequences of her actions.
Ela estava despreocupada com as consequências de suas ações.
•
He seemed completely careless about his future.
Ele parecia completamente despreocupado com o seu futuro.