Tuméfier belong to the 1st group.
Tuméfier is conjugated the same way that verbs that end in : -ier
Tuméfier is conjugated with auxiliary avoir.
Tuméfier verb is
direct transitive.
French verb tuméfier can be conjugated in the reflexive form: Se tuméfier Tuméfier verb is a direct transitive verb, so passive voice can be used.
However, although the terminations are perfectly regular, stem can be irregular and have numerous variations.
Tuméfier is conjugated the same way that verbs that end in : -ier.