εὔπειστος
From LSJ
Χαίρειν ἐπ' αἰσχροῖς οὐδέποτε χρὴ πράγμασιν → Non decet in rebus esse laetum turpibus → In schlimmer Not ist Freude niemals angebracht
English (LSJ)
ον, (πείθομαι) of persons,
A easily persuaded, Arist.EN 1151b10. 2 easy to demonstrate, Id.LI969b22; easy to convince people of, S.Aj.151 (anap., v. l. εὔπιστ-).