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