confornico
Could not find confornicentur in Logeion dictionaries.
confornicentur Verb: present passive subjunctive 3rd plural of confornico
con-fornĭco, āre,
- v. a., to over-arch, vault over (Vitr.): cellas, Vitr. 5, 5; 8, 7.
cōn-fornico, āre, ganz wölben, überwölben, Vitr. 5, 5, 2 u.a.
cōnfornĭcō, āre, tr., voûter : Vitr. Arch. 5, 5, 2.