proneness

/P R OW1 N N AH0 S/
noun
  1. 1

    The quality or state of being prone, or of bending downward.

    โ€œThe proneness of animals is opposed to the erect posture of human beings.โ€

  2. 2

    The state of lying with the face down.

  3. 3

    Descent; declivity.

    โ€œthe proneness of a hillโ€

  4. 4

    Inclination of mind, heart, or temper; propension; disposition.

    โ€œproneness to self-gratificationโ€

Antonyms

Source: https://en.wiktionary.org/wiki/proneness