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