"PIE" . . . "122296" . _:B3a55865331ffdab511638707c3faf16c . "*Hreu‑os [n.]" . "Etymology for: rūs (la1423)" . "*Hreu‑os [n.]" . . _:B3a55865331ffdab511638707c3faf16c "*Hreu‑os" .