LATIN DICTIONARYLexicon Latīnum
adjectivethird-declension one-termination adjective

dēmēns

dēmēns (genitive dēmentis, comparative dēmentior, superlative dēmentissimus)
Classical[ˈdeː.mẽːs]Ecclesiastical[ˈdɛː.mens]

Meaning

  1. one terminationout of one’s mind or senses: mad, raving, insane, crazy; more generally: foolish, reckless, distracted, infatuated
    [...] Īliacōsque iterum dēmēns audīre labōrēs / exposcit, [...].And the toils of Ilium — again? [It’s a] mad [request, yet Dido wants] to hear [of them, and so] she implores [Aeneas to retell his tale], …. (Unusual behavior: Dido asks Aeneas, night after night, to describe the fall of Troy and subsequent adventures that reinforce her heroic ideal of him.)29 BCE – 19 BCE, Vergilius, Aeneis 4.78-79
    At Deus sīc eum interpellāvit: 'O dēmēns, hac nocte reposcetur ā tē anima tua, quæ vērō parastī, cujus erunt?'.....: 'O fool,....?'Lucas, XII XX

Latīnē defined in Latin in our graded readers

mente captus
dēmēns -entis — in Aeneis, ch. 9

Choosing the right word Döderlein's Latin Synonyms

Amens · Demens · Insanus · Vesanus · Excors · Vecors · Furor · Delirium · Rabies · Cerritus · Lymphatus

1. Amentia shows itself negatively and passively; dementia, positively and energetically. The amens is without reason, and either acts not at all, or acts without reason, like the idiot, ἄφρων; the demens, while he fancies that he is doing right, acts in direct opposition to reason, like the madman, παράφρων. Hence, amens metu, terrore; demens scelere, discordia, etc. 2. Insanus has a privative; vesanus, a depravative meaning. The insanus in his passion oversteps the measure and bounds of right, and gives one the impression of a guilty person; the vesanus, in his delusion, wanders from the right path, follows a false object, and gives one the impression of an unfortunate person. 3. Excors means of weak understanding in general, without the ability of reflecting and examining, in opp. to cordatus; vecors means, of a perverted understanding, without the ability of reflecting calmly, from the mind being taken up with one fixed idea. 4. Furor (fervere) denotes mental irritation, ecstasy, as raging, μανικός; delirium (ληρεῖν), a physical and childish remission of the mental faculties; rabies (ῥαβάσσειν, ἄραβος), a half-moral condition of a passionate insanity, as frantic, λύσσα. The furibundus forgets the bounds of sense, the delirus babbles nonsense, the rabidus will bite and injure when he can. 5. Cerritus and lymphatus betoken frenzy, as a demoniacal state, as possessed, cerritus or ceritus, by Ceres, lymphatus, by the nymphs; they may also be considered as derived from κόρυζα, mucus narium, and from λέμφος, mucus, as symbols of stupidity. (v. 89.)

Declension

singular
formmasculinefeminineneuter
nominativedēmēnsdēmēnsdēmēns
genitivedēmentisdēmentisdēmentis
dativedēmentīdēmentīdēmentī
accusativedēmentemdēmentemdēmēns
ablativedēmentī
dēmente
dēmentī
dēmente
dēmentī
dēmente
vocativedēmēnsdēmēnsdēmēns
plural
formmasculinefeminineneuter
nominativedēmentēsdēmentēsdēmentia
genitivedēmentiumdēmentiumdēmentium
dativedēmentibusdēmentibusdēmentibus
accusativedēmentīs
dēmentēs
dēmentīs
dēmentēs
dēmentia
ablativedēmentibusdēmentibusdēmentibus
vocativedēmentēsdēmentēsdēmentia

dē-mens, entis,
I. adj., out of one's mind or senses; mad, raving; foolish (cf. amens) (class. and very freq.; for syn. cf.: amens, excors, vecors, insanus, vesanus, delirus, alienatus mente): qua perturbatione animi quae, sanus cum esset, timebat ne evenirent, ea demens eventura esse dicebat, Cic. Div. 2, 55 fin.: summos viros desipere, delirare, dementes esse dicebas, id. N. D. 1, 34, 94 (for which, delirare et mente esse captum, id. Off. 1, 27, 94): ego te non vecordem, non furiosum, non mente captum, non tragico illo Oreste aut Athamante dementiorem putem, id. Pis. 20, 47; cf. Orestes, Hor. S. 2, 3, 133 and 135; 1, 6, 97; 1, 10, 74; id. Od. 1, 37, 7; Juv. 15, 1: Pentheus, Verg. A. 4, 469: in tranquillo tempestatem adversam optare dementis est, Cic. Off. 1, 24, 83; cf. id. Rep. 1, 1: quem fugis, ah, demens? Verg. E. 2, 60: non tacui demens, id. A. 2, 94 et saep.—
II. Poet. transf., of inanimate subjects: manus, Tib. 1, 10, 56: somnia, Prop. 3, 8, 15 (4, 7, 15 M.): furor, id. 1, 13, 20: discordia, Verg. A. 6, 280: falx, id. ib. 3, 7: strepitus, Hor. Od. 3, 19, 23: cura alieni pericli, Val. Fl. 6, 474: cf. ratio, Nep. Paus. 3, 1: otium, Plin. 2, 23, 21, § 85.—Sup.: causa dementissimi consilii, Cic. Phil. 2, 22, 53; Auct. Harusp. resp. 26.—Adv.: dēmenter, foolishly, madly (rare): tanta res tam dementer credita, * Cic. Cat. 3, 9, 22; Ov. M. 4, 259: dementissime testabitur, Sen. Ben. 4, 27 fin.

Origins

From dē- + mēns (“mind, reason”).

Descendants
  • Catalandement
  • Englishdementfrom Middle French dément
  • Englishdementedfrom Middle French dément
  • Frenchdémentfrom Middle French dément
  • Frenchdémentefrom Middle French dément
  • Italiandemente
  • Portuguesedemente
  • Romaniandement
  • Spanishdemente
  • Siciliandimenti

In English words that came into English from dēmēns

  • dementiadēmentia
  • dementeddemento
  • dementdēmēns
  • dementatedēmentātus
  • demencydēmentia

Quick answers

What does dēmēns mean in Latin?
dēmēns, a adjective, means “out of one’s mind or senses: mad, raving, insane, crazy; more generally: foolish, reckless, distracted, infatuated”.
How do you pronounce dēmēns?
In classical Latin, [ˈdeː.mẽːs]; in ecclesiastical (church) Latin, [ˈdɛː.mens].
Which English words come from dēmēns?
English words that go back to Latin dēmēns include dement, dementia, demented, dementate and demency.