a disparu, est parti
She went away without saying goodbye.
Elle est partie sans dire au revoir.
The pain went away, went away already.
La douleur a disparu, elle a déjà disparu.
— Shoplifters (2018)
I don't know why Tom went away.
Je ne sais pas pourquoi Tom est parti.
He went away without saying a word.
Il est parti sans dire un mot.