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