evam - in this way; yudhyan - (Dvivida) fighting; bhagavatā - by the Lord; bhagne bhagne - being repeatedly broken; punaḥ punaḥ - again and again; ākṛṣya - pulling out; sarvataḥ - from everywhere; vṛkṣān - trees; nirvṛkṣam - treeless; akarot - he made; vanam - the forest.

Thus fighting the Lord, who again and again demolished the trees He was attacked with, Dvivida kept on uprooting trees from all sides until the forest was left treeless.