Bêtifier belong to the 1
st group.
Bêtifier is conjugated the same way that verbs that end in :
-ier
Bêtifier is conjugated with
auxiliary avoir.
Bêtifier verb is
direct transitive, intransitive.
French verb bêtifier can be conjugated in the reflexive form:
Se bêtifier
Bêtifier verb is a direct transitive verb, so passive voice can be used.