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