observator

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)

observātor: ōris, m. id.,
I a watcher, observer (perh. not ante-Aug.): nemo observator, nemo castigator assistet, Plin. Pan. 40: observator et custos bonorum, Sen. Ep. 41, 2: Catholicae legis, i. e. one who obeys it, Cod. Th. 16, 5, 1.

observātŏr,¹⁵ ōris, m. (observo), observateur, celui qui remarque : Sen. Ep. 41, 2 ; Plin. Min. Pan. 40