Dédire belong to the 3
rd group. Dédire is a common french verb.
Dédire is conjugated the same way that verbs that end in :
-ire
Dédire is conjugated with
auxiliary avoir.
Dédire verb is
direct transitive.
French verb dédire can be conjugated in the reflexive form:
Se dédire
Dédire verb is a direct transitive verb, so passive voice can be used.