σπουδά

From LSJ

σὺν μυρίοισι τὰ καλὰ γίγνεται πόνοις → good things come with many pains | no pain, no gain

Source

English (Slater)

σπουδά earnestness ἐγὼ δὲ συνεφαπτόμενος σπουδᾷ (O. 10.97) τᾶς εὐδαίμονος ἀμφὶ Κυράνας θέμεν σπουδὰν ἅπασαν (P. 4.276)

Russian (Dvoretsky)

σπουδά: ἡ дор. = σπουδή.