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