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