महाभारतः mahābhārataḥ - book-8, chapter-57, verse-9

ततः प्रायाद्रथेनाशु केशवस्तव वाहिनीम् ।
कर्णं प्रति महेष्वासं द्वैरथे सव्यसाचिना ॥९॥

9. tataḥ prāyādrathenāśu keśavastava vāhinīm ,
karṇaṁ prati maheṣvāsaṁ dvairathe savyasācinā.

9. tataḥ prāyāt rathena āśu keśavaḥ tava vāhinīm
karṇam prati maheṣvāsam dvairathe savyasācinā

9. tataḥ keśavaḥ āśu rathena tava vāhinīm prati karṇam maheṣvāsam savyasācinā dvairathe [artham] prāyāt.

9. Then, Kesava (Krishna) swiftly drove his chariot towards your army, specifically towards Karna, the great archer, for his duel (dvairatha) with Arjuna (Savyasacin).

Words meanings summery:

• ततः (tataḥ) - then, thereupon (then, thereupon, from that)

• प्रायात् (prāyāt) - he drove (his chariot) (he went, he departed, he set out)

• रथेन (rathena) - by chariot, with a chariot

• आशु (āśu) - quickly, swiftly, immediately

• केशवः (keśavaḥ) - Kesava (an epithet of Vishnu/Krishna)

• तव (tava) - your (referring to Duryodhana or Dhritarashtra, the narrator's audience) (your, of you)

• वाहिनीम् (vāhinīm) - army, host, division of an army

• कर्णम् (karṇam) - Karna (proper name)

• प्रति (prati) - towards (towards, against, in regard to)

• महेष्वासम् (maheṣvāsam) - the great archer (Karna) (great archer, one with a great bow)

• द्वैरथे (dvairathe) - in a duel, in single combat (between two charioteers)

• सव्यसाचिना (savyasācinā) - by Savyasacin (Arjuna)

Words meanings and morphology

ततः (tataḥ) - then, thereupon (then, thereupon, from that)

(indeclinable)

प्रायात् (prāyāt) - he drove (his chariot) (he went, he departed, he set out)

(verb)

3rd person , singular, active, past imperfect (laṅ) of pra-yā

Imperfect tense, 3rd person singular

From root 'yā' with prefix 'pra'

Prefix: pra

Root: yā (class 2)

रथेन (rathena) - by chariot, with a chariot

(noun)

Instrumental, masculine, singular of ratha

ratha - chariot, car, vehicle

आशु (āśu) - quickly, swiftly, immediately

(indeclinable)

केशवः (keśavaḥ) - Kesava (an epithet of Vishnu/Krishna)

(proper noun)

Nominative, masculine, singular of keśava

keśava - having beautiful hair, long-haired; an epithet of Vishnu/Krishna

तव (tava) - your (referring to Duryodhana or Dhritarashtra, the narrator's audience) (your, of you)

(pronoun)

Genitive, singular of yuṣmad

yuṣmad - you

वाहिनीम् (vāhinīm) - army, host, division of an army

(noun)

Accusative, feminine, singular of vāhinī

vāhinī - an army, host, division of an army

From 'vah' (to carry)

Root: vah (class 1)

कर्णम् (karṇam) - Karna (proper name)

(proper noun)

Accusative, masculine, singular of karṇa

karṇa - ear; Karna (a celebrated warrior in the Mahābhārata)

प्रति (prati) - towards (towards, against, in regard to)

(indeclinable)

महेष्वासम् (maheṣvāsam) - the great archer (Karna) (great archer, one with a great bow)

(adjective)

Accusative, masculine, singular of maheṣvāsa

maheṣvāsa - a great archer, having a great bow

Compound type : bahuvrīhi (mahā+iṣvāsa)

• mahā – great, large, mighty
  adjective
• iṣvāsa – bow (literally 'arrow-thrower')
  noun (masculine)

Note: Agrees with Karnaṃ

द्वैरथे (dvairathe) - in a duel, in single combat (between two charioteers)

(noun)

Locative, masculine, singular of dvairatha

dvairatha - single combat between two charioteers, a duel between two chariots

Derived from 'dviratha' (two chariots)

सव्यसाचिना (savyasācinā) - by Savyasacin (Arjuna)

(proper noun)

Instrumental, masculine, singular of savyasācin

savyasācin - ambidextrous, left-handed archer; an epithet of Arjuna

Compound type : bahuvrīhi (savya+sācin)

• savya – left, left-hand
  adjective (masculine)
• sācin – drawing (a bow), shooter
  adjective (masculine)
  Agent noun from root sañj
  Root: sañj (class 1)