τετραίνω (tetrainō)

to bore through, pierce, perforate , (Homer):—;Pass., λίθος τετρημένος (Herdotus Historicus); ὁ οὐρανὸς τέτρηται the sky has holes in it , (Herdotus Historicus); χάσμα τῆς γῆς τετρημένον a chasm formed by perforating the earth, (Plato Philosophus) (ML)