"Pronity" is a word in ENGLISH

búyok - To bend, curve, incline, cause to lean; be prone to, have a—propensity for,— tendency towards,—leaning to,— proneness,—predisposition,—inclination,— bias,—bent,—set,—turn,—warp. …

Inclination; propensity; proneness; tendency.

Inclined; propense; disposed; -- applied to the mind or affections, usually in an ill sense. Followed by to.

Inclination of mind, heart, or temper; propension; disposition; as, proneness to self-gratification.

Leaning toward, in a moral sense; inclined; disposed; prone; as, women propense to holiness.