PRONENESS + NOUN
animals, hill, self-gratification
noun
The quality or state of being prone, or of bending downward.
The proneness of animals is opposed to the erect posture of human beings.
The state of lying with the face down.
Descent; declivity.
the proneness of a hill
Inclination of mind, heart, or temper; propension; disposition.
proneness to self-gratification
i Register
In some senses, proneness is marked as dated. Watch for register when choosing this word.