quattuor
From Wiktionary, the free dictionary
From Wiktionary, the free dictionary
40 | ||
← 3 | IV 4 |
5 → |
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Cardinal: quattuor Ordinal: quārtus Adverbial: quater Proportional: quadruplus Multiplier: quadruplex, quadriplex Distributive: quaternus, quadrīnus Collective: quaterniō Fractional: quadrāns, teruncius |
From Proto-Italic *kʷettwōr (*t duplicated preceding *-w-), from Proto-Indo-European *kʷetwṓr, neuter plural of *kʷetwóres. Cognates include Sanskrit चतुर् (catur), Old Armenian չորք (čʻorkʻ), Ancient Greek τέσσαρες (téssares), and Old English fēower (English four).
The change of *e to a is unexplained; the expected form would be *quettuor. One theory suggests contamination with the zero-grade form *kʷtwr̥-.
quattuor (indeclinable)
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