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