"PIE" . "?" . _:B845d6e240ee823e7cdea8026221d01a1 . "*ser‑e/o‑" . "Etymology for: serō (la1497)" . "*ser‑e/o‑" . . _:B845d6e240ee823e7cdea8026221d01a1 "*ser‑e/o‑" .