What is the Latin word for unbidden?

The usual Latin words for “unbidden” are iniussus, ulter. The right choice depends on the sense; see the distinctions below.

English → Latin

“unbidden” in Latin

iniussusunbidden, voluntary; spontaneous ulterthat is beyond

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

unbidden

injussus: injussu alicujus (not by anybody’s command): ultro (spontaneously; of our own accord; opposed to jussus or alicujus jussu).

Quick answer

What is the Latin word for unbidden?: The usual Latin words for “unbidden” are iniussus, ulter. 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.