Was heißt »sorglos« auf Englisch?

Das Adjektiv sorglos lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Deutsch/Englische Beispielübersetzungen

Meine Eltern führen ein sorgloses Leben auf dem Lande.: My parents live at ease in the country.
Herr Johnson war besorgt wegen der Geldbeträge, die durch sorgloses Management verloren gingen.: Mr Johnson was concerned about the amount of money that was being lost because of careless management.
Mir scheint, er ist zu sorglos.: It seems to me that he is too careless.
Er fuhr sorglos und hatte einen Unfall.: He drove carelessly and had an accident.
Tom ging sorglos im Park spazieren.: Tom was walking in the park with nothing on his mind.
Wer bei kleinen Dingen sorglos mit der Wahrheit umgeht, dem ist auch bei großen nicht zu trauen.: Whoever is careless with the truth in small matters cannot be trusted with important matters.
Wir waren jung und sorglos.: We were young and carefree.
Tom ist sorglos.: Tom is careless.; Tom is carefree.
Tom war sorglos.: Tom was careless.
Tom ist sehr sorglos.: Tom is very careless.
Sie führt ein sorgloses Leben.: Her life is carefree.

Why are people so careless?
How could you be so careless?
I didn't think you would be so careless.
I didn't think you'd be so careless.
Tom was very careless.
Tom is careless, isn't he?
That was very careless of you.
It was very careless of you!
I admit that I've been careless.
I admit I was careless.
He admitted he'd been careless.
She admitted she'd been careless.
We're getting careless.
The two girls, quite unconstrained and careless, danced in the freedom and gaiety of their hearts.
That happened to you because you were careless.
I admit that I was careless.
It was careless of him to leave the door open.
I'm very careless.
You're very careless.
She was punished for careless driving.