What is the Latin word for dulness?

The usual Latin words for “dulness” are stupiditās, stupor, vigor; also sopor, lentitūdō, tarditās. The right choice depends on the sense; see the distinctions below.

English → Latin

“dulness” in Latin

stupiditāssenselessness, dullness, stupidity stuporNumbness; dullness, insensibility, stupidity, stupefaction; astonishment, wonder, amazement.; Dullness, stupidity, stoli vigorvigor, liveliness, activity; power, strength sopora deep sleep, sopor; sleep (in general), slumber; catalepsy; the sleep of death; death; stupefaction; lethargy, stupor; lentitūdōsluggishness, dullness; apathy, insensibility tarditāsslowness, tardiness inerswithout skill, unskilled, unskillful, incompetent, crude; inactive, lazy, idle, indolent, sluggish, inert; worthless; st sēgnitiasloth, slowness, tardiness, sluggishness, inactivity hebetātiōThe process of making something dull, dim or faint.; The quality of being dull, dim or faint; dullness, dimness, faintne

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

dulness s.

Stupidity, stupiditas; stupor (Cic.); vigor animi obtusus; vis animi obtusa: hebes acies mentis; obtusior animi acies or vigor; mens tarda, imbecillitas ingenii (of the understanding).

Drowsiness, sopor (Verg.).

Sluggishness, lentitudo; tarditas (Cic.); inertia; segnities.

Dimness, oculorum hebetatio (Plin.).

Bluntness, hebetatio; hebetudo.

Weakness, etc., infirmitas oculorum: hebes acies oculorum (of the eyes).

Quick answer

What is the Latin word for dulness?: The usual Latin words for “dulness” are stupiditās, stupor, vigor; also sopor, lentitūdō, tarditās. 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.