तदा then, तस्य his, तत् वचनम् words, श्रुत्वा hearing, राघवःRaghava, शोकमूर्छितः deluded in sorrow, छिन्नमूलः roots cut, द्रुमःइव like a tree, भूमौ on the ground, निपपात fell

On hearing, Hanuman's words Raghava became deluded in sorrow and fell on the ground like a tree cut at the root.