• baladeva-janārdanau — Balarāma and Kṛṣṇa
  Dual compound — the two are named in one word because they are tattva-wise inseparable. Gauḍīya doctrine: Balarāma is the ādi-guru and the first svayaṁ-prakāśa expansion; the dual form is Bhāgavata grammar for advaya-jñāna-tattva. A contiguous-token join of synonyms 'baladeva' and 'janārdanau'.
• gopaiḥ — by cowherd boys
  Kṛṣṇa enters Kaṁsa's royal arena escorted by gopas — Vraja walks into Mathurā. The sakhya-rasa enters territory that has only known kṣatriya-protocol, and the rasa wins.
• gaja-danta — the elephant's tusks
  Taken from the corpse of the demon-elephant, these are now ornaments-as-weapons in Bhagavān's hand. The Gauḍīya reading: Kṛṣṇa converts every implement of demonic violence into His own paraphernalia — see also Kāliya's hood as His dancing-floor (10.16). A contiguous-token join of synonyms 'gaja' and 'danta'.
• vara-āyudhau — whose weapons were the chosen ones
  'Chosen weapons' — vara — singles out the tusks as the proper armament for the moment. Bhāgavata-tattva: the Lord and His expansion choose weapons appropriate to līlā, not by external necessity. A contiguous-token join of synonyms 'vara' and 'āyudhau'.

• What unexpected tool has Kṛṣṇa already handed you for your next encounter?
• Where do you wait for traditional weapons when the tusk is right there?

Two brothers, two tusks, one work. Balarāma and Kṛṣṇa enter the arena like a single Bhagavān split into elder and younger — the source and His first expansion walking shoulder to shoulder, weapons drawn from the same enemy.