evaṁ sumantritārthās te
guruṇārthānudarśinā
hitvā tri-viṣṭapaṁ jagmur
gīrvāṇāḥ kāma-rūpiṇaḥ
evam - thus; su-mantrita - being well advised; arthāḥ - about duties; te - they (the demigods); guruṇā - by their spiritual master; artha-anudarśinā - whose instructions were quite befitting; hitvā - giving up; tri-viṣṭapam - the heavenly kingdom; jagmuḥ - went; gīrvāṇāḥ - the demigods; kāma-rūpiṇaḥ - who could assume any form they liked.
The word kāma-rūpiṇaḥ indicates that the demigods, the inhabitants of the heavenly planets, can assume any form they desire. Thus it was not at all difficult for them to remain incognito before the eyes of the demons.