They had powerful-but-finicky engines that were prone to spontaneous combustion.
From the online.wsj.com
Satoshi Iue is an astute and cautious businessman, not prone to hasty decisions.
From the businessweek.com
Buck, a Tea Party favorite, is seen by some as a gaffe-prone sound-bite machine.
From the abcnews.go.com
If anything, the UK is less prone to this tendency than other developed nations.
From the bbc.co.uk
He has been a little accident prone, a bit of a boat rocker of late, as we know.
From the guardian.co.uk
It is important to find out if you or a loved one have or are prone to diabetes.
From the latimes.com
If no underlying cause is determined, you may be genetically prone to hair loss.
From the ocregister.com
If they decide not to shop or go to lessons in a quake-prone building, so be it.
From the nzherald.co.nz
Lepper's political party is particularly prone to suicides of chief politicians.
From the economist.com
More examples
Having a tendency (to); often used in combination; "a child prone to mischief"; "failure-prone"
Lying face downward
(proneness) being disposed to do something; "accident proneness"
The word "prone," meaning "naturally inclined to something, apt, liable," has been recorded in English since 1382; the meaning "lying face-down" was first recorded in 1578, but is also referred to as "lying down" or "going prone."
(proneness) The quality or state of being prone, or of bending downward; as, the proneness of beasts is opposed to the erectness of man; The state of lying with the face down; Descent; declivity; as, the proneness of a hill; Inclination of mind, heart, or temper; propension; disposition; as, ...
(Prones) (noun) Someone lying prone or kneeling. These could be hit players or bystanders. Avoid prones as they may move when you least expect it, causing a collision.
Lying face down Pronation Palm of the hand faces backward; shifting the body weight to the inside of the foot.
Latin pronatus = bent forwards; hence, recumbent face-down posture.
Describing the position of a person lying horizontally on the abdomen, with the face turned downward.