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