महाभारतः mahābhārataḥ - book-8, chapter-5, verse-11

वृषभो वृषभस्येव यो युद्धे न निवर्तते ।
शत्रोरपि महेन्द्रस्य वज्रसंहननो युवा ॥११॥

11. vṛṣabho vṛṣabhasyeva yo yuddhe na nivartate ,
śatrorapi mahendrasya vajrasaṁhanano yuvā.

11. vṛṣabhaḥ vṛṣabhasya iva yaḥ yuddhe na nivartate
śatroḥ api mahendrasya vajrasaṃhananaḥ yuvā

11. yaḥ vṛṣabhasya iva vṛṣabhaḥ yuddhe na nivartate,
mahendrasya śatroḥ api vajrasaṃhananaḥ yuvā

11. ...who, like a bull among bulls, never retreats in battle, even from a powerful enemy like Mahendra (Indra), a young man whose body (saṃhanana) is as firm as a thunderbolt.

Words meanings summery:

• वृषभः (vṛṣabhaḥ) - Karna is compared to an excellent bull, symbolizing strength and courage. (bull, chief, excellent one)

• वृषभस्य (vṛṣabhasya) - of a bull

• इव (iva) - like, as if, similar to

• यः (yaḥ) - Referring to Karna (who, which, that)

• युद्धे (yuddhe) - in battle, in war

• न (na) - not, no

• निवर्तते (nivartate) - he turns back, retreats

• शत्रोः (śatroḥ) - of an enemy

• अपि (api) - even, also, too

• महेन्द्रस्य (mahendrasya) - Referring to the god Indra (of Mahendra, of great Indra)

• वज्रसंहननः (vajrasaṁhananaḥ) - Describing Karna's physical strength and resilience (whose body is compact/hard as a thunderbolt)

• युवा (yuvā) - young, youthful man

Words meanings and morphology

वृषभः (vṛṣabhaḥ) - Karna is compared to an excellent bull, symbolizing strength and courage. (bull, chief, excellent one)

(noun)

Nominative, masculine, singular of vṛṣabha

vṛṣabha - bull, male, chief, best, strong

वृषभस्य (vṛṣabhasya) - of a bull

(noun)

Genitive, masculine, singular of vṛṣabha

vṛṣabha - bull, male, chief, best, strong

इव (iva) - like, as if, similar to

(indeclinable)

यः (yaḥ) - Referring to Karna (who, which, that)

(pronoun)

Nominative, masculine, singular of yad

yad - who, which, what (relative pronoun)

युद्धे (yuddhe) - in battle, in war

(noun)

Locative, neuter, singular of yuddha

yuddha - battle, fight, war

Root: yudh (class 4)

न (na) - not, no

(indeclinable)

निवर्तते (nivartate) - he turns back, retreats

(verb)

3rd person , singular, middle, present (lat) of nivṛt

Prefix: ni

Root: vṛt (class 1)

शत्रोः (śatroḥ) - of an enemy

(noun)

Genitive, masculine, singular of śatru

śatru - enemy, foe, rival

अपि (api) - even, also, too

(indeclinable)

महेन्द्रस्य (mahendrasya) - Referring to the god Indra (of Mahendra, of great Indra)

(proper noun)

Genitive, masculine, singular of mahendra

mahendra - Great Indra, a name for Indra

Compound type : karmadhāraya (mahā+indra)

• mahā – great, mighty, large
  adjective (masculine/feminine/neuter)
  Stem of mahat
• indra – Indra (name of a deity), chief
  proper noun (masculine)

वज्रसंहननः (vajrasaṁhananaḥ) - Describing Karna's physical strength and resilience (whose body is compact/hard as a thunderbolt)

(adjective)

Nominative, masculine, singular of vajrasaṃhanana

vajrasaṁhanana - having a body (constitution) as hard as a thunderbolt

Compound type : bahuvrihi (vajra+saṃhanana)

• vajra – thunderbolt, diamond
  noun (masculine/neuter)
• saṃhanana – compactness, close texture, constitution (of body)
  noun (neuter)
  Derived from root han with prefix sam
  Prefix: sam
  Root: han (class 2)

युवा (yuvā) - young, youthful man

(adjective)

Nominative, masculine, singular of yuvan

yuvan - young, youthful, a young man