ressasser

to dwell on, to brood over, to keep going over

ʁ ə . s a . s e
verb Rare #45,757
to dwell on, to brood over, to keep going over Often used for repeatedly thinking or talking about something, usually unpleasant or unproductive.
FR: Il ne cesse de ressasser ses problèmes.
EN: He can't stop dwelling on his problems.

Ressasser ne sert à rien.

Dwelling on it is pointless.

— Qui suis-je (2014)

Je pense que tu as tort de ressasser ces rêves.

I think you're wrong to keep dwelling on these dreams.

— Harry Potter et la Coupe de feu (2005)

Si je ne l'avais pas retrouvé, j'aurais passé la journée à ressasser.

If I hadn’t found it again, I would have spent the day dwelling on it.

— Aquarius (2016)

Sounds similar to