What is the Latin word for informant?

The usual Latin words for “informant” are auctor, audiō. The right choice depends on the sense; see the distinctions below.

English → Latin

“informant” in Latin

auctorseller, vendor; author, originator; sponsor, advocate audiōto hear, listen to; to attend, pay attention to; to accept, agree with, obey

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

informant

auctor; or by circumlocution. My informant is one whom I can trust, id certo auctore comperi (if the thing is detected; or audivi, etc.).

Quick answer

What is the Latin word for informant?: The usual Latin words for “informant” are auctor, audiō. 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.