महाभारतः mahābhārataḥ - book-1, chapter-61, verse-91

शेषस्यांशस्तु नागस्य बलदेवो महाबलः ।
सनत्कुमारं प्रद्युम्नं विद्धि राजन्महौजसम् ॥९१॥

91. śeṣasyāṁśastu nāgasya baladevo mahābalaḥ ,
sanatkumāraṁ pradyumnaṁ viddhi rājanmahaujasam.

91. śeṣasya aṃśaḥ tu nāgasya baladevaḥ mahābalaḥ
sanatkumāram pradyumnam viddhi rājan mahaujasam

91. Baladeva, the greatly powerful, was indeed a portion of Shesha, the Naga. And, O King, know Pradyumna as Sanatkumara, the one of great energy.

Words meanings summery:

• शेषस्य (śeṣasya) - of the cosmic serpent Shesha (of Shesha)

• अंशः (aṁśaḥ) - a portion, manifestation (a part, portion, share)

• तु (tu) - indeed, emphasizing the statement (but, indeed, on the other hand)

• नागस्य (nāgasya) - of the serpent (Shesha) (of a serpent, specifically a Naga)

• बलदेवः (baladevaḥ) - Baladeva (Baladeva (name of Krishna's elder brother))

• महाबलः (mahābalaḥ) - greatly powerful (greatly powerful, mighty)

• सनत्कुमारम् (sanatkumāram) - Sanatkumara (Sanatkumara (name of a divine sage))

• प्रद्युम्नम् (pradyumnam) - Pradyumna (Pradyumna (name of Krishna's son))

• विद्धि (viddhi) - know, understand

• राजन् (rājan) - O King (vocative) (O King)

• महौजसम् (mahaujasam) - greatly energetic/powerful (of great energy/splendor)

Words meanings and morphology

शेषस्य (śeṣasya) - of the cosmic serpent Shesha (of Shesha)

(noun)

Genitive, masculine, singular of śeṣa

śeṣa - remainder, residue; name of a mythical serpent (Nāga) supporting the world

अंशः (aṁśaḥ) - a portion, manifestation (a part, portion, share)

(noun)

Nominative, masculine, singular of aṃśa

aṁśa - part, portion, share, division, aspect

तु (tu) - indeed, emphasizing the statement (but, indeed, on the other hand)

(indeclinable)

नागस्य (nāgasya) - of the serpent (Shesha) (of a serpent, specifically a Naga)

(noun)

Genitive, masculine, singular of nāga

nāga - serpent, snake; a kind of mythical serpent (Nāga); elephant

Note: Qualifies Shesha, meaning 'Shesha, who is a Naga'.

बलदेवः (baladevaḥ) - Baladeva (Baladeva (name of Krishna's elder brother))

(noun)

Nominative, masculine, singular of baladeva

baladeva - Baladeva (Krishna's elder brother); a name of Balarama, the god of strength

महाबलः (mahābalaḥ) - greatly powerful (greatly powerful, mighty)

(adjective)

Nominative, masculine, singular of mahābala

mahābala - greatly powerful, mighty, very strong

Compound type : bahuvrīhi (mahant+bala)

• mahant – great, large, mighty, considerable
  adjective
• bala – strength, power, might, force
  noun (neuter)

Note: Qualifies Baladeva.

सनत्कुमारम् (sanatkumāram) - Sanatkumara (Sanatkumara (name of a divine sage))

(noun)

Accusative, masculine, singular of sanatkumāra

sanatkumāra - Sanatkumara (one of the four Kumaras, mind-born sons of Brahma; a perpetually young sage)

Note: Object of 'viddhi'.

प्रद्युम्नम् (pradyumnam) - Pradyumna (Pradyumna (name of Krishna's son))

(noun)

Accusative, masculine, singular of pradyumna

pradyumna - Pradyumna (son of Krishna); pre-eminently mighty, illustrious, glorious

Note: Object of 'viddhi'.

विद्धि (viddhi) - know, understand

(verb)

2nd person , singular, active, imperative (loṭ) of vid

Root: vid (class 2)

Note: Anomalous imperative form.

राजन् (rājan) - O King (vocative) (O King)

(noun)

Vocative, masculine, singular of rājan

rājan - king, ruler, sovereign

महौजसम् (mahaujasam) - greatly energetic/powerful (of great energy/splendor)

(adjective)

Accusative, masculine, singular of mahaujas

mahaujas - of great energy, splendor, might, powerful

Compound type : bahuvrīhi (mahant+ojas)

• mahant – great, large, mighty, considerable
  adjective
• ojas – energy, vigor, might, splendor, strength
  noun (neuter)

Note: Qualifies Sanatkumaram and Pradyumnam.