Éteindre belong to the 3rd
group. Éteindre is a very common french verb.
Éteindre is conjugated the same way that verbs that end in : -ndre
Éteindre is conjugated with auxiliary avoir
Éteindre verb is
French verb éteindre can be conjugated in the reflexive form: S'éteindre
verb is a direct transitive verb, so passive voice can be used.