Rembrunir belong to the 2
nd group.
Rembrunir is conjugated the same way that verbs that end in :
-ir
Rembrunir is conjugated with
auxiliary avoir.
Rembrunir verb is
direct transitive.
French verb rembrunir can be conjugated in the reflexive form:
Se rembrunir
Rembrunir verb is a direct transitive verb, so passive voice can be used.