pātāla-talam - the planet Pātāla; ārabhya - beginning from; saṅkarṣaṇa-mukha - from the mouth of the Supreme Lord in His form as Saṅkarṣaṇa; analaḥ - the fire; dahan - burning; ūrdhva-śikhaḥ - its flame going upward; viṣvak - all the directions; vardhate - grows; vāyunā - by winds; īritaḥ - impelled.

Beginning from Pātālaloka, a fire grows, emanating from the mouth of Lord Saṅkarṣaṇa. Its flames shooting upward, driven by great winds, it scorches everything in all directions.