LATIN DICTIONARYLexicon Latīnum
English → Latin

“arduous” in Latin

The English word arduous itself goes back to Latin arduus.

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

arduous
high, Vid:
Difficult, gravis (heavy): difficilis: non facilis (difficult): magnus (great): durus (hard): impeditus (encumbered with difficulties). An arduous task, magnum opus atque arduum.

Quick answer

What is the Latin word for arduous?
The usual Latin words for “arduous” are gravis, difficilis, magnus; also dūrus, impediō. 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.