• upaspṛśya — having touched (water)
  Gerund of upa + √spṛś (to touch). The standard prefatory ācamana — purification before any serious act. Gauḍīyas note the detail: the chapter is not setting Arjuna up to fail by negligence; he does everything right.
• namaḥ-kṛtya — having offered obeisance
  Compound: namaḥ (obeisance) + kṛtya (having done). Arjuna salutes Śiva — the giver of his weapons. Even with Kṛṣṇa beside him, his procedural reverence is correctly directed.
• divyāni-astrāṇi — celestial weapons
  Compound: divya (celestial) + astra (weapon). Arjuna's full astra-arsenal — Brahmāstra, Pāśupata, Vāyavyāstra, et al. The chapter will show that even this arsenal has a ceiling.
• saṁsmṛtya — having recollected
  Gerund of saṁ + √smṛ (to remember). Mantras are not just memorized; they are recalled at the precise moment of need. Gauḍīyas extend the verb to bhakti — smaraṇa is the recollection that activates power.

• What preparation have I been skipping before acts that require God's backing?
• Where could ritual humility deepen my reliance on my own gifts?

Before drawing the bow, Arjuna touches water, bows to Maheśvara, recollects his mantras. This is not bow-craft alone — it is full kṣatriya ritual, every protocol in place. The Bhāgavatam is being meticulous: when Arjuna fails, it will not be because anything was omitted; it will be because the cause is elsewhere.