What is the Latin word for january?

The usual Latin words for “january” are Iānuārius, mēnsa. The right choice depends on the sense; see the distinctions below.

English → Latin

“january” in Latin

Iānuāriusof January mēnsaa table; a table of food; meal, course, feast; an altar (sacrificial table)

The English word january itself goes back to Latin Iānus, through Iānuārius.

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

january

Januarius (mensis). On the first of January, Kalendis Januariis (☞ Januarius being an adjective).

Quick answer

What is the Latin word for january?: The usual Latin words for “january” are Iānuārius, mēnsa. 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.