• patnī-saṁyāja — the ritual in which sponsor and wife offer together
  patnī + saṁyāja (joint offering). One of the closing rites of large yajñas. Gauḍīyas note that the ritual codifies what bhakti everywhere asserts — the householder is dharmically a couple, not an individual.
• avabhṛthyaiḥ — the final ritual baths
  Instrumental plural — from ava (down) + √bhṛ (to bear). The sponsor's closing bath that carries the rite's residual energy into water. Gauḍīyas read avabhṛtha as the sealing seal — yajña ends with water as it began with fire.
• rāma-hrade — in Lord Paraśurāma's lake
  rāma (Paraśurāma) + hrada (lake). Samanta-pañcaka. Gauḍīyas note that yajña sealed in an avatāra's lake compounds its weight: Bhagavān's water completing Bhagavān's father's offering.
• yajamāna — the sponsor of the sacrifice
  From √yaj. The one for whom the yajña is performed. Gauḍīyas distinguish the yajamāna (agent) from the ṛtvik (technician) — the agent's interior orientation is what makes the rite efficacious.

• What sacred undertaking of mine never received its proper closing?
• How could a small closing ritual mark the end of my current spiritual season?

The patnī-saṁyāja and avabhṛthya — the rituals in which the sponsor offers with his wife and then takes the closing bath — are the suturing stitches of the yajña. With these complete, Vasudeva leads the sages in bathing in Lord Paraśurāma's lake: bhagavat-avatāra's water completing the work of yajña on Bhagavān's own field.