posteo
Could not find postibat in Logeion dictionaries.
postibat Verb: imperfect active indicative 3rd singular of posteo
post-ĕo, īre, v. n.,
- to go after or behind; trop., to be inferior to; with acc. (post-class.): aliquem honore, Sid. Ep. 1, 11.
post-eo, īre, nachgehen, bildl., nachstehen, alqm, Sidon. epist. 1, 11, 10.
postĕō, īre, intr., venir en second lieu (après qqn) : Sid. Ep. 1, 11.