ἄπυλος
From LSJ
ὕπνος δεινὸν ἀνθρώποις κακόν → sleep is a terrible evil for humans (Menander, Sententiae monostichoi 1.523)
English (LSJ)
ἄπυλον, = ἀπύλωτος (not secured by gates), metaph, Vett.Val. 334.13.
Spanish (DGE)
-ον
que no tiene puertas fig. τοὺς περιβόλους ... ἀπύλους los recintos sin puertas Vett.Val.321.2.