LATIN DICTIONARYLexicon Latīnum
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“impotence” in Latin

The English word impotence itself goes back to Latin possum, through impotentia.

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

impotence
imbecillitas: infirmitas [Vid: WEAKNESS]. ☞ Impotentia, once in this sense (Ter., Ad. 4, 3, 16): usually = want of self-government, etc.

Quick answer

What is the Latin word for impotence?
The usual Latin words for “impotence” are imbēcillitās, īnfirmitās. 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.