pronitas
From LSJ
Δρυὸς πεσούσης πᾶς ἀνὴρ ξυλεύεται → Quercu cadente, nemo ignatu abstinet → Fiel erst die Eiche, holt ein jeder Mann sich Holz
Latin > English (Lewis & Short)
prōnĭtas: ātis, f. pronus,
I inclination, propensity, proneness: naturae ad malum, Sen. Contr. praef., dub. (the phrase is wanting in several MSS.).