nyaruṇat - he enveloped; sūtikā-āgāram - the house where the birth was taking place; śaraiḥ - with arrows; nānā - various; astra - to missiles; yojitaiḥ - attached; tiryak - horizontally; ūrdhvam - upwards; adhaḥ - downwards; pārthaḥ - Arjuna; cakāra - made; śara - of arrows; pañjaram - a cage.

Arjuna fenced in the house where the birth was taking place by shooting arrows attached to various missiles. Thus the son of Pṛthā constructed a protective cage of arrows, covering the house upwards, downwards and sideways.