• mīmāṁsamānāyām — as she was conjecturing
  Present participle of √man (intensive desiderative — to consider deeply), fem. loc. absolute. The same root as Mīmāṁsā, the school of Vedic exegesis. The Bhāgavatam quietly compares Rukmiṇī's inferential reasoning to scriptural exegesis — she is the household's mīmāṁsaka.
• devakī-sutaḥ — the son of Devakī
  Compound: devakī (Devakī) + sutaḥ (son). Kṛṣṇa is named here through His Dvārakā-mother — His other-mother — at the moment when His own mother-by-līlā arrives. Two motherhoods converging in one verse.
• devakī-ānakadundubhyām — with Devakī and Vasudeva
  Dvandva: devakī + ānakadundubhi (Vasudeva, drum-named). Vasudeva's epithet ānakadundubhi commemorates the celestial drums that sounded at his birth (Canto 10.1). The Bhāgavatam never tires of these multi-layered names.
• uttamaḥ-ślokaḥ — the one praised by the best verses, Lord Kṛṣṇa
  Compound: uttamaḥ (highest) + ślokaḥ (verse, praise). One of Kṛṣṇa's signature titles in the Bhāgavatam — He is the One whose praises constitute the highest poetry. The narrator names Him at His full theological altitude.

• Where does the Lord arrive precisely as you are reaching a personal conclusion?
• How does this verse calibrate trust about His timing?

While Rukmiṇī is still conjecturing, Kṛṣṇa Himself arrives with Vasudeva and Devakī — the parents of Bhagavān walk in with Bhagavān. The chapter assembles the whole Yādava elder-cluster on stage; the recognition is about to be officially witnessed.