LATIN DICTIONARYLexicon Latīnum
English → Latin

“sum” in Latin

The English word sum itself goes back to Latin summus, through summa.

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

sum s.
An amount, summa. A small sum, summula: a large sum of money, magna pecuniae summa; pecunia magna or grandis.
Whole contents, summa: caput. The sum of all, summa summarum; Vid: also SUBSTANCE, SUMMARY.

Quick answer

What is the Latin word for sum?
The usual Latin words for “sum” are summa, caput, summŭla; also grandis. 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.