prone 
/ˈproʊn/ adjective
/ˈproʊn/ adjective 1 [more prone; most prone] : likely to do, have, or suffer from something — usually + to ▪ They are prone to (making) errors/mistakes. = They are error-prone/mistake-prone. [=they make many errors/mistakes] ▪ Tests showed that the machine is prone to failure/fail. ▪ He is somewhat prone to depression. ▪ People in my family are prone to heart disease. ▪ He is prone to (having) accidents. = He is accident-prone. [=he has many accidents] ▪ an athlete who is injury-prone [=who is often injured] 2 : lying with the front of your body facing downward
▪ He was lying on the floor in a prone position. = He was (lying) prone on the floor. — compare supine
▪ He was lying on the floor in a prone position. = He was (lying) prone on the floor. — compare supine
— prone·ness /ˈproʊnnəs/ noun [noncount]
▪ proneness to accidents/depression
/ˈproʊnnəs/ noun [noncount] ▪ proneness to accidents/depression
