efficacia
From LSJ
Μακάριος, ὅστις οὐσίαν καὶ νοῦν ἔχει → Felix, qui mentem cum divitiis possidet → Glückselig, wer Vermögen und Vernunft besitzt
Latin > English (Lewis & Short)
effĭcācĭa: ae, f. efficax,
I efficacy, efficiency, virtue (post-Aug.), Plin. 11, 5, 4, § 12; Amm. 14, 8, 5; 16, 12, 25; Vulg. Sirach, 9, 4; Lact. de Ira D. 10, 37.