Was heißt »schwachsinnig« auf Englisch?

Das Adjektiv »schwachsinnig« lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Synonyme

Tom did a foolish thing.
Tom was foolish enough to tell Mary that.
You're foolish to say such a thing.
He's foolish.
Do you suppose me so foolish, that I cannot walk by a young lady's side without plunging headlong in love with her?
"I know very well what you have come here for," said the witch. "It is very foolish of you!"
I doubt that Tom would be that foolish.
I dare say I am merely a foolish woman with a young girl's fancies.
Tom has done something foolish.
She may have done something foolish.
Tom did something very foolish.
Don't be foolish, Anne.
Well, Marilla, I'll just tell you plain that I think you're doing a mighty foolish thing–a risky thing, that's what.
That was an absolutely foolish thing to say.
We were young and foolish back then.
It was a very foolish mistake.
They were young and foolish.
She was young and foolish.
He was young and foolish.
She is young and foolish.