viśvarūpa - of Viśvarūpa; siddhi - of perfection; prāpti - achievement; jānena - the Lord knows; sakala - everything; dakṣiṇa-deśa - South India; uddhārite - just to liberate; karena - makes; ei - this; chala - pretense.

Knowing everything, Śrī Caitanya Mahāprabhu was aware that Viśvarūpa had already passed away. A pretense of ignorance was necessary, however, so that He could go to South India and liberate the people there.