What is the Latin word for unexpectedly?

The usual Latin words for “unexpectedly” are inopīnātus, imprōvīsus, īnspērātus; also repēns. The right choice depends on the sense; see the distinctions below.

English → Latin

“unexpectedly” in Latin

inopīnātusunexpected, unsupposed imprōvīsusunforeseen, unexpected; sudden īnspērātusunhoped-for, unexpected; unforeseen repēnssudden, unexpected; recent, fresh

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

unexpectedly

praeter opinionem: (ex) inopinato: improviso: (ex) insperato: praeter exspectationem: repente. To fall upon anybody unexpectedly, aliquem necopinantem or imprudentem opprimere.

Quick answer

What is the Latin word for unexpectedly?: The usual Latin words for “unexpectedly” are inopīnātus, imprōvīsus, īnspērātus; also repēns. 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.