• samyak sampāditaḥ — completely fulfilled
  Samyak = perfectly; sampādita = accomplished. The strongest available pair to describe full completion. Sāndīpani uses superlatives — fitting, since his disciples are Bhagavān Himself.
• vatsa — my dear boy
  Vatsa = calf, dear child. The exact same word Yaśodā uses in Vraja for Kṛṣṇa. Sāndīpani's vātsalya is now spoken aloud — the chapter ends inside the same rasa it began with, but now flowing through the guru.
• guru - niṣkrayaḥ — remuneration of the guru
  Niṣkraya = repayment, redemption. Different from dakṣiṇā: niṣkraya carries the sense of buying back, redeeming. The guru-debt is technically discharged.
• kāmānām avaśiṣyate — of (his) desires remains
  Ava + √śiṣ — to remain. Sāndīpani says: no kāma remains. The complete cessation of desire is here not by jñāna-yoga but by being fully served — a Gauḍīya signature: prema's transactions exhaust desire faster than philosophy.
• yuṣmat - vidha — of persons like You
  Yuṣmat-vidha = of your type. Sāndīpani begins to acknowledge openly — 'persons like you' (already hinted at v.37). The disguise is fully lifted in the guru's diction by the chapter's end.

• Padaseva Pr Seminars Oriya - SB Canto-10 Chapter-45-47 - Mayapur
  His Grace Padaseva Prabhu· Oriya

Sāndīpani says, in effect: 'you have fully repaid your guru — with disciples like you, what desire could remain?' The guru's contentment is itself the final dakṣiṇā; bhakti completes both directions of the bond.