• śravaṇāya alam — suitable for hearing
  Contiguous (śravaṇāya + alam). Alam = fitting. The disguised Lord asks permission to hear — Bhagavān, asking permission. Gauḍīyas read this as the lowest-status posture ever adopted by Bhagavān in conversation with an asura.
• vyavasitam — intention, resolve
  Past participle of vi-ava-√sā — what has been firmly decided. The Lord asks Vṛka to articulate his vyavasita aloud — speaking it cements the trap, since spoken intent will be tested against spoken doubt in v.32-34.
• vibho — O mighty one
  Vocative of vibhu — pervasive, mighty. Hari calls the running, frightened, asuric Vṛka 'O mighty one.' The honorific is bait — and also exact, since Vṛka is mighty in his way. Gauḍīya humor: Bhagavān is generous even in His tactics.
• pumbhiḥ dhṛtaiḥ — with persons who have been engaged for help
  Contiguous (pumbhiḥ + dhṛtaiḥ). Dhṛta = taken hold of, retained. Hari invokes the generic social truth — people need helpers — to position Himself as one. Camouflage of common sense.
• sva-arthān samīhate — one accomplishes one's purposes
  Contiguous-join (sva + arthān + samīhate). Sva-artha — one's own goal. Hari speaks the asura's logic back to him: 'You have a sva-artha; let Me help.' The asura nods, the trap closes.

An older traveler asks a tired man: 'Tell us your plan — perhaps we can help.' The plural 'we' is the courtly humility of a king who has temporarily set down His crown. Vṛka, schooled in transactional speech, hears only the offer of help; he does not hear the camera being set.