monstratio
From LSJ
ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → life is not worth living if you do not have at least one friend
Latin > English (Lewis & Short)
monstrātĭo: ōnis, f. id.,
I a showing, direction (only in Terence and Vitruv.): defessus sum ambulando: ut, Syre, te cum tuā Monstratione magnus perdat Juppiter, direction, Ter. Ad. 4, 6, 1: solers et expedita monstratio, indication, hint, Vitr. 6, 1, 12.
Latin > French (Gaffiot 2016)
mōnstrātĭō, ōnis, f. (monstro), action de montrer [le chemin] : Ter. Ad. 71 || indication : Vitr. Arch. 6, 1, 12.