Rassir belong to the 3
rd group.
Rassir is conjugated the same way that verbs that end in :
-ir
Rassir is conjugated with
auxiliary avoir.
Rassir is a defective verb. It can not be conjugated in all possible forms.
Rassir verb is intransitive.
French verb rassir can be conjugated in the reflexive form:
Se rassir