irrationalis

Latin

Etymology

Etymology tree

Proto-Indo-European *né

Proto-Indo-European *n̥-

Proto-Italic *n̥-

Latin in-

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 *h₂el-

Proto-Indo-European *-is

Proto-Indo-European *h₂élisder.?

Proto-Italic *-ālis

Latin -ālis

Latin ratiōnālis

Latin irratiōnālis

From in- (“un-”) + ratiōnālis (“rational”).

Pronunciation

• (Classical Latin) IPA^(key): [ɪr.ra.ti.oːˈnaː.lɪs]
• (modern Italianate Ecclesiastical) IPA^(key): [ir.rat.t͡si.oˈnaː.lis]

Adjective

irratiōnālis (neuter irratiōnāle); third-declension two-termination adjective

1. irrational

Declension

Third-declension two-termination adjective.

	singular			plural
	masc./fem.	neuter		masc./fem.	neuter
nominative	irratiōnālis	irratiōnāle		irratiōnālēs	irratiōnālia
genitive	irratiōnālis			irratiōnālium
dative	irratiōnālī			irratiōnālibus
accusative	irratiōnālem	irratiōnāle		irratiōnālīs irratiōnālēs	irratiōnālia
ablative	irratiōnālī			irratiōnālibus
vocative	irratiōnālis	irratiōnāle		irratiōnālēs	irratiōnālia

References

• “irrationalis”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “irrationalis”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.