महाभारतः mahābhārataḥ - book-1, chapter-61, verse-90

यस्तु नारायणो नाम देवदेवः सनातनः ।
तस्यांशो मानुषेष्वासीद्वासुदेवः प्रतापवान् ॥९०॥

90. yastu nārāyaṇo nāma devadevaḥ sanātanaḥ ,
tasyāṁśo mānuṣeṣvāsīdvāsudevaḥ pratāpavān.

90. yaḥ tu nārāyaṇaḥ nāma devadevaḥ sanātanaḥ
tasya aṃśaḥ mānuṣeṣu āsīt vāsudevaḥ pratāpavān

90. Indeed, the eternal God of gods named Narayana—a powerful portion of Him manifested as Vasudeva among humans.

Words meanings summery:

• यः (yaḥ) - Indeed, that (referring to Narayana) (who, which)

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

• नारायणः (nārāyaṇaḥ) - The deity Narayana (Narayana (a name of Vishnu))

• नाम (nāma) - named, by the name of (name; by name; indeed)

• देवदेवः (devadevaḥ) - the supreme deity (god of gods)

• सनातनः (sanātanaḥ) - eternal (eternal, perpetual, ancient)

• तस्य (tasya) - of Him (referring to Narayana) (his, of him, its)

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

• मानुषेषु (mānuṣeṣu) - among humans (on Earth) (among men, among humans)

• आसीत् (āsīt) - was, manifested (was, existed)

• वासुदेवः (vāsudevaḥ) - Vasudeva (Lord Krishna) (Vasudeva (name of Krishna))

• प्रतापवान् (pratāpavān) - powerful, glorious (glorious, mighty, powerful, majestic)

Words meanings and morphology

यः (yaḥ) - Indeed, that (referring to Narayana) (who, which)

(pronoun)

Nominative, masculine, singular of ya

ya - who, which, what

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

(indeclinable)

नारायणः (nārāyaṇaḥ) - The deity Narayana (Narayana (a name of Vishnu))

(noun)

Nominative, masculine, singular of nārāyaṇa

nārāyaṇa - descendant of Nara; name of Vishnu, one who resides in water or in human hearts

नाम (nāma) - named, by the name of (name; by name; indeed)

(indeclinable)

देवदेवः (devadevaḥ) - the supreme deity (god of gods)

(noun)

Nominative, masculine, singular of devadeva

devadeva - god of gods, the supreme deity

Compound type : tatpuruṣa (deva+deva)

• deva – god, deity, celestial being
  noun (masculine)
  Root: div (class 4)
• deva – god, deity, celestial being
  noun (masculine)
  Root: div (class 4)

सनातनः (sanātanaḥ) - eternal (eternal, perpetual, ancient)

(adjective)

Nominative, masculine, singular of sanātana

sanātana - eternal, perpetual, everlasting, ancient, primeval

Note: Qualifies Narayana

तस्य (tasya) - of Him (referring to Narayana) (his, of him, its)

(pronoun)

Genitive, masculine, singular of tad

tad - that, he, she, it

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

(noun)

Nominative, masculine, singular of aṃśa

aṁśa - part, portion, share, division, aspect

मानुषेषु (mānuṣeṣu) - among humans (on Earth) (among men, among humans)

(noun)

Locative, masculine, plural of mānuṣa

mānuṣa - human, man, related to man, earthly

आसीत् (āsīt) - was, manifested (was, existed)

(verb)

3rd person , singular, active, past imperfect (laṅ) of as

Root: as (class 2)

वासुदेवः (vāsudevaḥ) - Vasudeva (Lord Krishna) (Vasudeva (name of Krishna))

(noun)

Nominative, masculine, singular of vāsudeva

vāsudeva - son of Vasudeva (Krishna); Vasudeva (father of Krishna)

Note: Here refers to Krishna, as an Aṃśa of Narayana.

प्रतापवान् (pratāpavān) - powerful, glorious (glorious, mighty, powerful, majestic)

(adjective)

Nominative, masculine, singular of pratāpavat

pratāpavat - glorious, mighty, powerful, majestic, possessing splendor or valor

Note: Qualifies Vasudeva