• bhinna-śirāḥ — head shattered
  Contiguous (bhinna + śirāḥ). Bhinna again — first the dhī shattered (v.35), now the śiras. The Bhāgavatam stages the parallel: when intelligence breaks, the head literally breaks. Inner and outer collapse together.
• vajra-āhataḥ iva — as if struck by a thunderbolt
  Contiguous (vajra + āhataḥ + iva). Vajra — Indra's weapon and the standing symbol of indestructible force. The verse names the boon's force as vajra-class — the same speed that made Śiva fear made Vṛka fall.
• kṣaṇāt — in a fraction of a second
  Ablative of kṣaṇa. Same sadyaḥ-speed Śiva's blessing-and-curse have always had (v.12) — turned now against the asura who exploited it. The chapter's verdict on speed: cuts both ways.
• jaya-śabdaḥ — the cry of 'Victory!'
  Contiguous (jaya + śabdaḥ). The devas' relief, heard from the sky. Gauḍīya reading: when an asura falls by his own asurya and Hari's līlā, the cosmos rejoices — not in cruelty but in restored order.
• namaḥ-śabdaḥ — the cry of 'Obeisances!'
  Contiguous (namaḥ + śabdaḥ). Namaḥ rendered to Hari for the rescue. The asura's death-instant is, for the rest of creation, a moment of bowing. Gauḍīyas: every līlā lands as namaḥ in someone's mouth.

A man fires a thunderbolt straight up and stands directly beneath it. The chapter closes the geometry it opened: the boon Vṛka asked from Śiva returns through Vṛka's own palm into Vṛka's own crown. Death by his own hand — the literal shape of asurya, exposed.