महाभारतः mahābhārataḥ - book-4, chapter-50, verse-12

यस्य नागो ध्वजाग्रे वै हेमकेतनसंश्रितः ।
धृतराष्ट्रात्मजः श्रीमानेष राजा सुयोधनः ॥१२॥

12. yasya nāgo dhvajāgre vai hemaketanasaṁśritaḥ ,
dhṛtarāṣṭrātmajaḥ śrīmāneṣa rājā suyodhanaḥ.

12. yasya nāgaḥ dhvājāgre vai hemaketanasamśritaḥ
dhṛtarāṣṭrātmajaḥ śrīmān eṣa rājā suyodhanaḥ

12. An elephant rests at the top of whose banner, supported by a golden emblem; this is indeed the glorious son of Dhritarashtra, King Suyodhana.

Words meanings summery:

• यस्य (yasya) - whose, of whom

• नागः (nāgaḥ) - elephant

• ध्वाजाग्रे (dhvājāgre) - at the top of the banner

• वै (vai) - indeed, verily

• हेमकेतनसम्श्रितः (hemaketanasamśritaḥ) - resting upon a golden emblem/sign

• धृतराष्ट्रात्मजः (dhṛtarāṣṭrātmajaḥ) - son of Dhritarashtra

• श्रीमान् (śrīmān) - glorious, fortunate, prosperous

• एष (eṣa) - King Suyodhana (this (masculine))

• राजा (rājā) - king

• सुयोधनः (suyodhanaḥ) - King Duryodhana, whose birth name was Suyodhana (Suyodhana (proper noun))

Words meanings and morphology

यस्य (yasya) - whose, of whom

(pronoun)

Genitive, masculine, singular of yad

yad - who, which, what

नागः (nāgaḥ) - elephant

(noun)

Nominative, masculine, singular of nāga

nāga - snake, serpent, elephant

ध्वाजाग्रे (dhvājāgre) - at the top of the banner

(noun)

Locative, neuter, singular of dhvājāgra

dhvājāgra - tip/top of a banner

Compound type : tatpuruṣa (dhvaja+agra)

• dhvaja – banner, standard, flag
  noun (masculine)
• agra – tip, top, front, chief
  noun (neuter)

वै (vai) - indeed, verily

(indeclinable)

हेमकेतनसम्श्रितः (hemaketanasamśritaḥ) - resting upon a golden emblem/sign

(adjective)

Nominative, masculine, singular of hemaketanasamśrita

hemaketanasamśrita - supported by/resting upon a golden emblem

Compound type : tatpuruṣa (hemaketana+saṃśrita)

• hemaketana – golden emblem, golden sign
  noun (neuter)
• saṃśrita – supported, resting upon, resorted to
  adjective (masculine)
  Past Passive Participle
  Derived from sam-śri with the kta suffix
  Prefix: sam
  Root: śri (class 1)

धृतराष्ट्रात्मजः (dhṛtarāṣṭrātmajaḥ) - son of Dhritarashtra

(noun)

Nominative, masculine, singular of dhṛtarāṣṭrātmaja

dhṛtarāṣṭrātmaja - son of Dhritarashtra

Compound type : tatpuruṣa (dhṛtarāṣṭra+ātmaja)

• dhṛtarāṣṭra – Dhritarashtra (name of a king)
  proper noun (masculine)
• ātmaja – son, daughter, born of oneself
  noun (masculine)
  Derived from ātman

श्रीमान् (śrīmān) - glorious, fortunate, prosperous

(adjective)

Nominative, masculine, singular of śrīmat

śrīmat - beautiful, glorious, prosperous, fortunate, illustrious

Possessive suffix -mat

एष (eṣa) - King Suyodhana (this (masculine))

(pronoun)

Nominative, masculine, singular of etad

etad - this

राजा (rājā) - king

(noun)

Nominative, masculine, singular of rājan

rājan - king, ruler, sovereign

सुयोधनः (suyodhanaḥ) - King Duryodhana, whose birth name was Suyodhana (Suyodhana (proper noun))

(proper noun)

Nominative, masculine, singular of suyodhana

suyodhana - Suyodhana (name of Duryodhana)