asininus
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)
ăsĭnīnus: a, um, adj. asinus,
I of or produced by an ass: stercus, Varr. R. R. 1, 38, 2: pullus, ass's foal, a young ass, id. ib. 2, 8: pilus, Plin. 8, 21, 30, § 72, where Jan reads asini: pruna asinina cognominata a vilitate, id. 15, 13, 12, § 41.