adeptio
From LSJ
κρεῖττον σιωπᾶν ἐστιν ἢ λαλεῖν μάτην → it's better to keep silence than to speak without reason (Menander)
Latin > English (Lewis & Short)
ădeptĭo: ōnis, f. adipiscor,
I an obtaining, attainment: nos beatam vitam non depulsione mali, sed adeptione boni judicemus, Cic. Fin. 2, 13, 41: bonorum (opp., malorum evitatio), Quint. 5, 10, 33: alicujus commodi, Cic. Part. Or. 32, 113.