LATIN DICTIONARYLexicon Latīnum
adjectivethird-declension two-termination adjective

irratiōnābilis

irratiōnābilis (neuter irratiōnābile)
Classical[ɪr.ra.ti.oːˈnaː.bɪ.lɪs]Ecclesiastical[ir.rat.t͡si.oˈnaː.bi.lis]

Meaning

  1. two terminationirrational, unreasoning, unreasonable

Declension

singular
formmasculinefeminineneuter
nominativeirratiōnābilisirratiōnābilisirratiōnābile
inratiōnābile
genitiveirratiōnābilisirratiōnābilisirratiōnābilis
dativeirratiōnābilī
inratiōnābilī		irratiōnābilī
inratiōnābilī		irratiōnābilī
inratiōnābilī
accusativeirratiōnābilem
inratiōnābilem		irratiōnābilem
inratiōnābilem		irratiōnābile
inratiōnābile
ablativeirratiōnābilī
inratiōnābilī		irratiōnābilī
inratiōnābilī		irratiōnābilī
inratiōnābilī
vocativeirratiōnābilisirratiōnābilisirratiōnābile
inratiōnābile
plural
formmasculinefeminineneuter
nominativeirratiōnābilēs
inratiōnābilēs		irratiōnābilēs
inratiōnābilēs		irratiōnābilia
inratiōnābilia
genitiveirratiōnābilium
inratiōnābilium		irratiōnābilium
inratiōnābilium		irratiōnābilium
inratiōnābilium
dativeirratiōnābilibus
inratiōnābilibus		irratiōnābilibus
inratiōnābilibus		irratiōnābilibus
inratiōnābilibus
accusativeirratiōnābilīs
irratiōnābilēs, inratiōnābilēs		irratiōnābilīs
irratiōnābilēs, inratiōnābilēs		irratiōnābilia
inratiōnābilia
ablativeirratiōnābilibus
inratiōnābilibus		irratiōnābilibus
inratiōnābilibus		irratiōnābilibus
inratiōnābilibus
vocativeirratiōnābilēs
inratiōnābilēs		irratiōnābilēs
inratiōnābilēs		irratiōnābilia
inratiōnābilia

irrătĭōnābĭlis (inr-), e, adj.,
I. without reason, irrational (post-class.; not in Quint., v. Spald. ad Quint. 2, 16, 16): error, App. Dogm. Plat. p. 21: motus, Amm. 31, 12, 15.— Of musical intervals, = logica, proportional, harmonic: irrationabilia (sunt) quibus non subest ratio, Mart. Cap. 9, § 949.—Subst.: irrătĭōnābĭlĭa, ĭum, n., unreasoning creatures, Lact. 2, 2, 17.— Adv.: irrătĭōnābĭlĭter, irrationally, Amm. 19, 10, 1; Tert. Poen. 2; Cael. Aur. Acut. 2, 37, 199.

Origins

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Italic*n̥-
  4. Latinirratiōnābilis

Proto-Indo-European *h₂er- Proto-Indo-European *-éh₁ti Proto-Indo-European *h₂reh₁- Proto-Italic *rēōr Latin reor Latin ratus Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin ratiō Proto-Indo-European *-dʰlom Proto-Italic *-ðlom Proto-Italic *-ðlis Latin -bilis Latin -ābilis Latin ratiōnābilis Latin irratiōnābilis From in- + ratiōnābilis.

In English words that came into English from irratiōnābilis

  • unreasonableirratiōnābilis
  • irrationableirratiōnābilis

Quick answers

What does irratiōnābilis mean in Latin?
irratiōnābilis, a adjective, means “irrational, unreasoning, unreasonable”.
How do you pronounce irratiōnābilis?
In classical Latin, [ɪr.ra.ti.oːˈnaː.bɪ.lɪs]; in ecclesiastical (church) Latin, [ir.rat.t͡si.oˈnaː.bi.lis].
Where does irratiōnābilis come from?
Proto-Indo-European *né → Proto-Indo-European *n̥- → Proto-Italic *n̥- → Latin irratiōnābilis.