• tat - cittaḥ — My mind fixed on her
  Compound: tat (her) + cittaḥ (mind). The same construction Gauḍīyas apply to the gopīs (kṛṣṇa-cittāḥ) is here inverted — Kṛṣṇa's citta is fixed on the devotee. Acintya-bhedābheda in one word: the Whole leans toward the part that loves Him.
• nidrām — I cannot get sleep
  Idiom: nidrām (sleep, accusative) + na labhe (I do not obtain). The Lord of Yoganidrā confesses insomnia. Prabhupāda underlines this as proof that Kṛṣṇa's affection is real, not mythological — bhakti pierces even Bhagavān's repose.
• udvāhaḥ — marriage
  From ud-√vah, lifting up, carrying away. The same root that will reappear when Kṛṣṇa literally lifts Rukmiṇī onto His chariot (53.56). The marriage Rukmī forbids is the one Kṛṣṇa accomplishes by lifting, not by negotiation.
• dveṣāt — out of enmity
  Ablative of dveṣa (hatred). Rukmī's envy is the catalyst of the līlā. Gauḍīyas note: even dveṣa from a kinsman becomes the occasion of Bhagavān's mercy — the rākṣasa-vivāha is born from his hatred and her love together.

Two flames reach for each other across a windless room — not one burning toward an unmoved other, but mutual leaning. Kṛṣṇa confesses sleeplessness for Rukmiṇī as openly as she has confessed it for Him. Bhagavān is not the unmoved object of bhakti; He is moved.