• ātmajaḥ — her own son, born of self
  Compound: ātma (self) + jaḥ (born from). The child born from one's own body — not adopted, not by surrogate. Rukmiṇī claims a specific biological tie, and the next clause grants the hypothesis.
• sūtikā-gṛhāt — from the maternity room
  Compound: sūtikā (new mother) + gṛhāt (from the house, abl.). The sūtikā-gṛha is the postnatal chamber — Vedic dharma's most protected interior, and the very place Śambara breached. The detail reactivates the original outrage.
• tulya-vayaḥ-rūpaḥ — equal in age and appearance
  Compound: tulya (equal) + vayaḥ (age) + rūpaḥ (form). Rukmiṇī's hypothesis is precise on two axes simultaneously — age and look. Both must match for the hypothesis to hold; both do.
• jīvati-kutracit — is living somewhere
  Verb + indefinite locative: jīvati (lives) + kutracit (somewhere, anywhere). She cannot yet say 'here'; the indefiniteness preserves the hypothesis. Bhakti often advances by what it cannot quite say.

'If my lost son still lives, He would be of just this age, just this look.' Rukmiṇī ventures the hypothesis — the bhakta sometimes can only approach the Lord through 'if.' The conditional clause is the door bhakti uses when the body is still ahead of the mind.