What is the Latin word for eighty?

The usual Latin words for “eighty” are octōgintā, octōgēni, octōgiēs; also octōgēnārius. The right choice depends on the sense; see the distinctions below.

English → Latin

“eighty” in Latin

octōgintāeighty; 80 octōgēnieighty each octōgiēseighty times octōgēnāriuseighty; eighty-year-old

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

eighty

octoginta: octogeni (distributive). Eighty times, octogies. A man of eighty years old, octogenarius; also, octoginta annos natus. The men of eighty years old, senes octogenarii; senes octogenum annorum.

Quick answer

What is the Latin word for eighty?: The usual Latin words for “eighty” are octōgintā, octōgēni, octōgiēs; also octōgēnārius. 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.