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English word probability comes from Latin probus, and later Latin probabilior (Likelier, more probable.)
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probus (Latin)
(morally) upright, honest, virtuous. Good, serviceable, excellent, superior, able.
probo (Latin)
I acquit, exonerate. I approve, commend. I demonstrate, prove. I test, inspect.
probabilior (Latin)
Likelier, more probable.
probabilitas (Latin)
Credibility. Probability.
probabilite (Middle French)
probability (English)
(mathematics) a number, between 0 and 1, expressing the precise likelihood of an event happening. An event that is likely to occur. The relative likelihood of an event happening. The state of being probable; likelihood.