Noah Webster
Propensity
PROPEN'SION
PROPENS'ITY, noun [Latin propensio.]
1. Bent of mind, natural or acquired; inclination; in a moral sense; disposition to any thing good or evil, particularly to evil; as a propensity to sin; the corrupt propensity of the will.
It requires critical nicety to find out the genius or propensions of a child.
2. Natural tendency; as the propension of bodies to a particular place.
[In a moral sense, propensity is now chiefly used.]