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libre (Adjective) "free"
Early 13th cent. From Latin liber 'id.' From Proto-Italic *leuþ-ero- 'id.' From Proto-Indo-European *h1leu̯dh-ero- "free" but literally "one of the people" in the sense that the people are assumed to be free, unenslaved individuals. From the root noun *h1leu̯dh- "people," taken directly from an older root verb *h1leu̯dh- "to grow."
Indo-European
Italic
Oscan lúvfreis "of the freeman," Paelignian loufir "freeman," Faliscan loferta "freewoman," Venetic louderobos "for the children"
Germanic
Old Norse lýðr "people," Old High German liut 'id.,' Old Saxon liud 'id.' Old English lēod (English lede)
Balto-Slavic
Old Church Slavonic ljudьje "people," Russian ljúdi 'id.,' Polish ludzie, Slovene ljudję̑ 'id.,' Lithuanian liáudis "lower people," Latvian ļaudis 'id.'
Hellenic
Ancient Greek ἐλεύθερος (eleytheros) "free"