prone

prone /ˈproʊn/ adjective
prone
/ˈproʊn/
adjective
Britannica Dictionary definition of PRONE
1 
[more prone; most prone] : likely to do, have, or suffer from something — usually + to
2 
: lying with the front of your body facing downward
— compare supine

— proneness

/ˈproʊnnəs/ noun [noncount]