What is the Latin word for ablative?

The usual Latin words for “ablative” are sextus, Latīnus. The right choice depends on the sense; see the distinctions below.

English → Latin

“ablative” in Latin

sextussixth LatīnusLatin; of or pertaining to Latium, the Latin language, people, or culture

The English word ablative itself goes back to Latin auferō, through ablātīvus.

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

ablative

Ablativus casus (Quint.); Latinus, sextus (Varr. in, Diom., p. 277, P.).

Quick answer

What is the Latin word for ablative?: The usual Latin words for “ablative” are sextus, Latīnus. 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.