What is the Latin word for grandmother?

The usual Latin words for “grandmother” are āvius, prōsocrus, proavia. The right choice depends on the sense; see the distinctions below.

English → Latin

“grandmother” in Latin

āviusremote, out of the way; astray, distracting prōsocrusgrandmother of one's wife proaviagreat-grandmother

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

grandmother

avia: the wife’s grandmother, prosocrus (Modestin., Dig., 38, 10, 4, § 6): great-grandmother, proavia (Suet., Cal., 10, and Jurisconsulti). PROV. To teach one’s grandmother to suck eggs, Vid: EGG.

Quick answer

What is the Latin word for grandmother?: The usual Latin words for “grandmother” are āvius, prōsocrus, proavia. 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.