出典:Wiktionary
出典:『Wiktionary』 (2026/09/02 18:33 UTC 版)
From Proto-Italic *kʷerkʷus, assimilated from Proto-Indo-European *pérkus ~ *pr̥kʷéu- (“oak”). The term appears to showcase that the assimilation of *kʷu to *ku postdated the assimilation of *p ... *kʷ to *kʷ ... *kʷ, which contradicts the relative chronology implied by Celtic forms such as Hercynia and therefore poses a problem for the Italo-Celtic hypothesis. To resolve this issue, it may be proposed that the assimilation of *p ... *kʷ to *kʷ ... *kʷ occured regularly in the oblique cases and then spread analogically to the nominative. Cognate with Old Norse fýri (as in fýriskógr (“pine-wood”). See also English fir.
quercus f (genitive quercūs or quercī); variously declined, fourth declension, second declension
Fourth-declension noun (dative/ablative plural in -ubus) or fourth-declension noun or second-declension noun.
| singular | plural | |
|---|---|---|
| nominative | quercus | quercūs quercī |
| genitive | quercūs quercī |
quercuum quercōrum |
| dative | quercuī quercō |
quercubus quercibus quercīs |
| accusative | quercum | quercūs quercōs |
| ablative | quercū quercō |
quercubus quercibus quercīs |
| vocative | quercus querce |
quercūs quercī |
![]()