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Latin word lupa comes from Latvian *welh₂, Proto-Indo-European *wl̥kʷós, and later Proto-Indo-European *wĺ̥kʷos (Wolf.)
*welh₂ (Latvian)
*wl̥kʷós (Proto-Indo-European)
*wel (Proto-Indo-European)
*wĺ̥kʷos (Proto-Indo-European)
Wolf.
*lukʷos (Proto-Italic)
Osco-Umbrian (Ligurian)
lupa (Latin)
(slang) prostitute. She-wolf.