_:B4c155c13d1aa8504cebc85560b73993d "*h₃rdʰ‑uo‑" . "PIE" . "89907" . _:B4c155c13d1aa8504cebc85560b73993d . "*h₃rdʰ‑uo‑" . "Etymology for: arduus (la0104)" . "*h₃rdʰ‑uo‑" . .