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