ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → life is not worth living if you do not have at least one friend
fundāmentālis, e (fondamentum), fondamental : Hier. Job 38.
fundāmentālis, e (fundamentum), zum Grund gehörig, Grund-, lapis, Hieron. in Iob 38. Augustin. serm. 337, 4.