Assombrir belong to the 2
nd group. Assombrir is a common french verb.
Assombrir is conjugated the same way that verbs that end in :
-ir
Assombrir is conjugated with
auxiliary avoir.
Assombrir verb is
direct transitive.
French verb assombrir can be conjugated in the reflexive form:
S'assombrir
Assombrir verb is a direct transitive verb, so passive voice can be used.