What is the Latin word for untenable?

The usual Latin words for “untenable” are īnfirmus, levis. The right choice depends on the sense; see the distinctions below.

English → Latin

“untenable” in Latin

īnfirmusweak, feeble; unhealthy, infirm, indisposed, sick; inconclusive levislight, not heavy; easy to digest; quick, swift, fleet, nimble, rapid

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

untenable

infirmus: levis. (The words are found in this connection and order.) levis et infirmus (weak; of arguments, etc.): *quod defendi non potest.

Quick answer

What is the Latin word for untenable?: The usual Latin words for “untenable” are īnfirmus, levis. 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.