propensity
/prəˈpɛnsəti/
noun
plural
propensities
plural
propensities
Britannica Dictionary definition of PROPENSITY
[count]
formal
:
a strong natural tendency to do something
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Why do some people have a propensity for/toward violence? [=why are some people violent?; why do some people have a tendency to be violent?]
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He had a propensity for crime.
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She has a propensity to assume the worst. [=she tends to assume the worst]