What is the Latin word for jointly?

The usual Latin words for “jointly” are ūnus, coniūnctim. The right choice depends on the sense; see the distinctions below.

English → Latin

“jointly” in Latin

ūnusone, single; alone coniūnctimjointly, unitedly, in common

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

jointly

unā (together in one place; hence in union with each other: jointly with, una cum): conjunctim (in common; together as a body; e.g., auxilia petere).

Quick answer

What is the Latin word for jointly?: The usual Latin words for “jointly” are ūnus, coniūnctim. 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.