• dārukaḥ — Dāruka
  Kṛṣṇa's personal chārioteer, a major figure throughout Canto 10. Gauḍīya tradition holds Dāruka as the embodiment of dāsya-sevā among Kṛṣṇa's personal staff — the servant whose entire role is to drive whenever the Lord moves.
• kāñcana - upaskaram — with golden trimmings
  Kāñcana (gold) + upaskara (trimming, fitting). The chariot is described as gold-fitted — Bhagavān's aiśvarya visible in the very vehicle. Even the chariot is a manifestation of Lakṣmī following Him.
• mṛga - rāṭ — the king of animals (lion)
  Mṛga (beast) + rāj (king). Third lion-image in the chapter (after Rukmiṇī's mṛgendraḥ and Mitravindā's dvipa-ariḥ). Gauḍīya commentators note the pattern: Kṛṣṇa's bridal departures are consistently lion-images — calm power moving among lesser beings.
• miṣatām — (of the kings) as they watched
  Present participle of √miṣ — to watch wide-eyed. The kings are not blind; they see clearly. Their failure is not perceptual but volitional — they cannot bring themselves to act effectively while watching.
• bhū - bhujām — of the earth-protectors
  Bhū (earth) + bhuj (enjoyer, protector). Variant of bhū-pā. The kings who claimed to protect/enjoy the earth watch the Lord of the earth depart with their hoped-for prize.

• Where does my opposition only watch what is being taken by the Lord?
• How does this image shift my relationship to envy?

Dāruka drives — the same chārioteer who will drive Kṛṣṇa across countless battles — and the kings watch the gold-trimmed chariot recede the way small forest animals watch a lion walk past, helpless and motionless. The kings could shoot at the chariot; they will, in the next verses. But the watching itself is already a kind of defeat.