LATIN DICTIONARYLexicon Latīnum
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“probability” in Latin

The English word probability itself goes back to Latin probō, through probābilitās.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

probability
verisimilitudo: probabilitas. In all probability., haud dubie: But mostly by circumlocution with verisimilis or videri. In all probability he will not come, verisimillimum est, eum non venturum; or, non venturus videtur; or, vereor, ut venturus sit. In all probability a war is at hand, bellum imminere or exarsurum esse videtur.

Quick answer

What is the Latin word for probability?
The usual Latin words for “probability” are vērisimilitūdō, probābilitās, vērī̆similis; also videō, vereor. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.