"PIE" . "?" . _:Bc685c0a05f00b408c23f968a62009dac . "*ser‑e/o‑" . "Etymology for: serō (la1497)" . "*ser‑e/o‑" . . _:Bc685c0a05f00b408c23f968a62009dac "*ser‑e/o‑" .