Opacifier belong to the 1st
group. Opacifier is a common french verb.
Opacifier is conjugated the same way that verbs that end in : -ier
Opacifier is conjugated with auxiliary avoir
Opacifier verb is
French verb opacifier can be conjugated in the reflexive form: S'opacifier
verb is a direct transitive verb, so passive voice can be used.