observator
From LSJ
τό γε μὴν ἀόργητον ἀνδρός ἐστι σοφοῦ → and to be able also to subdue anger is the part of a wise man
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.