LATIN DICTIONARYLexicon Latīnum
English → Latin

“unnecessary” in Latin

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

unnecessary
non necessarius (that need not necessarily be or exist): quod non opus est (not requisite, not necessary for use): supervacaneus (superfluous; ☞ supervacuus and superfluus are neither of them classic): vanus (vain, in vain; e.g., metus.) It is unnecessary to name them, eos nihil attinet nominare.

Quick answer

What is the Latin word for unnecessary?
The usual Latin words for “unnecessary” are supervacāneus, metus. 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.