• mocitāḥ-kṛcchrāt — freed from difficulty
  Two consecutive synonym-chunks. Kṛcchra — hardship, ascetic ordeal. The dungeon was an unwanted kṛcchra; Bhagavān made it cause su-dṛḍhā bhakti — a tapas they did not choose but received its phala.
• su-mahā-ātmanā — by the greatest of personalities
  Su-mahā-ātman — the greatest Self. The kings will keep this name on their lips; the verse marks their settled estimation of Kṛṣṇa, no longer 'King of Dvārakā' but mahā-ātmā.
• dhyāyantaḥ — meditating
  Present participle of √dhyai. The kings are now constant meditators — the smṛti they begged for in v.15, granted in v.18, operating as they ride.
• kṛtāni — the deeds (of the Lord of the universe)
  Past passive participle, neuter plural — 'things done'. Smaraṇa is here directed at līlā (kṛtāni), not merely on form. Gauḍīyas insist līlā-smaraṇa is the ripest form of remembrance; the verse seats the kings inside it.

Chariots roll out of Indraprastha in many directions, but inside every chariot the same scene replays: one cloud-dark form, four arms, soft voice. Geography disperses, dhyāna gathers. Released from kṛcchra outwardly, they have been bound inwardly to His kṛtāni.