bāhira ha-ite - externally; kare - makes; ratha-yātrā-chala - an excuse to enjoy the car festival; sundarācale - to Sundarācala, the Guṇḍicā temple; yāya - goes; prabhu - Lord Jagannātha; chāḍi' - leaving; nīlācala - Jagannātha Purī.

“Externally He gives the excuse that He wants to participate in the Ratha-yātrā festival, but actually He wants to leave Jagannātha Purī to go to Sundarācala, the Guṇḍicā temple, a replica of Vṛndāvana.