LATIN DICTIONARYLexicon Latīnum
English → Latin

“reasonable” in Latin

The English word reasonable itself goes back to Latin ratus, through ratiōnābilis.

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

reasonable
Endowed with reason, ratione praeditus or utens; rationis particeps: ☞ rationalis is not found before Sen., Ep., 113, 14.
That manifests reason, sanus (betraying good sense; opposed to insanus, insaniens): prudens (prudent, showing natural good sense): modestus (that does not transgress the limits of what is proper and becoming).
Agreeable to reason, *rationi conveniens, consentaneus.
Not immoderate, aequus (according to principles of equity): justus (according to natural law; both of things and persons): modicus (moderate, not too little and not too much; e.g., price, etc.): meritus (that which is owing or due to our deserts; e.g., praise): it is reasonable, aequum, verum (Vid: Liv., 3, 49, fin.), par, jus, fas est, with infinitive, or accusative and infinitive (Vid: Grotef., § 236, 5, 6; Zumpt, 600 and 623): I consider it reasonable, aequum esse censeo: more than reasonable, plus aequo (†): as is reasonable, ex aequo; sicut aequum est; ut par est: against or contrary to what is reasonable, contra quam fas est; contra fas: against what is reasonable and right, contra jus fasque: to make reasonable demands, aequa postulare: in a reasonable manner; Vid: REASONABLY.

Quick answer

What is the Latin word for reasonable?
The usual Latin words for “reasonable” are ūtor, sānus, prūdēns; also modestus, cōnsentāneus, aequus. 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.