What is the Latin word for twice?

The usual Latin words for “twice” are bis, duplus, Catullus. The right choice depends on the sense; see the distinctions below.

English → Latin

“twice” in Latin

bistwice, two times, on two occasions, in two ways duplusdouble (twice as much, or as big)Catullusa cognomen; a Latin poet of the late Roman Republic who wrote chiefly in the neoteric style of poetry

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

twice

bis: Twice as much, duplum; alterum tantum (as much again): twice as big, altero tanto major (so longior, etc.); duplo major: twice as much, duabus partibus plus: once or twice, semel atque iterum: twice a day, bis in die (Catullus, 64).

Quick answer

What is the Latin word for twice?: The usual Latin words for “twice” are bis, duplus, Catullus. 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.