Enceindre belong to the 3rd group.
Enceindre is conjugated the same way that verbs that end in : -ndre
Enceindre is conjugated with auxiliary avoir.
Enceindre verb is
direct transitive. Enceindre verb is a direct transitive verb, so passive voice can be used.
Enceindre is a french third group verb. So, this verb is irregular and do not follow a regular conjugation pattern like first or second group verbs. Follow this link to see all the endings of the conjugation of most of the third group verbs : conjugation rules and endings for the second group verbs.
ENCEINDRE : v. tr. Environner, entourer, enfermer. Il ne se dit que des Choses et en particulier des Ouvrages de guerre qui servent à circonscrire. Enceindre une ville de murailles. Enceindre de fossés, de palissades.