τείχισμα
From LSJ
Περὶ τοῦ ἐπέκεινα τοῦ νοῦ κατὰ μὲν νόησιν πολλὰ λέγεται, θεωρεῖται δὲ ἀνοησίᾳ κρείττονι νοήσεως → On the subject of that which is beyond intellect, many statements are made on the basis of intellection, but it may be immediately cognised only by means of a non-intellection superior to intellection
English (LSJ)
ατος, τό,
A wall or fort, E. HF1096 codd. (τυκ- is prob. cj.), Th.4.8,115, etc.; Τυρσηνῶν τ. Πελασγικόν, of the wall of Athens, Call. in Διηγήσεις iv 1 (cf. Sch.).