महाभारतः mahābhārataḥ - book-7, chapter-139, verse-13

यत्प्राविशन्महेष्वासः पाञ्चालानपराजितः ।
नृत्यन्निव नरव्याघ्रो रथमार्गेषु वीर्यवान् ॥१३॥

13. yatprāviśanmaheṣvāsaḥ pāñcālānaparājitaḥ ,
nṛtyanniva naravyāghro rathamārgeṣu vīryavān.

13. yat prāviśat maheṣvāsaḥ Pāñcālān aparājitaḥ |
nṛtyan iva naravyāghraḥ rathamārgeṣu vīryavān

13. yat aparājitaḥ vīryavān naravyāghraḥ maheṣvāsaḥ nṛtyan iva Pāñcālān rathamārgeṣu prāviśat.

13. Since that unconquered and mighty great archer, a tiger among men (naravyāghra), entered the Pañcālas' region as if dancing in the chariot paths.

Words meanings summery:

• यत् (yat) - since, because (which, what, that; since, because)

• प्राविशत् (prāviśat) - he entered

• महेष्वासः (maheṣvāsaḥ) - great archer, one with a great bow

• पाञ्चालान् (pāñcālān) - the Pañcālas (a people/territory)

• अपराजितः (aparājitaḥ) - unconquered, undefeated

• नृत्यन् (nṛtyan) - dancing

• इव (iva) - like, as if, as

• नरव्याघ्रः (naravyāghraḥ) - tiger among men, best of men

• रथमार्गेषु (rathamārgeṣu) - in the chariot paths/tracks

• वीर्यवान् (vīryavān) - mighty, powerful, valorous

Words meanings and morphology

यत् (yat) - since, because (which, what, that; since, because)

(indeclinable)

प्राविशत् (prāviśat) - he entered

(verb)

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

Prefix: pra

Root: viś (class 6)

Note: The 't' undergoes sandhi to 'n' before 'maheṣvāsaḥ' in the verse.

महेष्वासः (maheṣvāsaḥ) - great archer, one with a great bow

(noun)

Nominative, masculine, singular of maheṣvāsa

maheṣvāsa - great archer, one having a great bow

Compound type : bahuvrihi (mahā+īṣvāsa)

• mahā – great, mighty, large
  adjective (masculine)
• īṣvāsa – bow, arrow-shooter
  noun (masculine)

पाञ्चालान् (pāñcālān) - the Pañcālas (a people/territory)

(proper noun)

Accusative, masculine, plural of Pāñcāla

Pāñcāla - Pañcāla (name of a country and its people)

अपराजितः (aparājitaḥ) - unconquered, undefeated

(adjective)

Nominative, masculine, singular of aparājita

aparājita - unconquered, undefeated, invincible

Past Passive Participle with negative prefix

Compound of 'a-' (negation) and 'parājita' (PPP of parā-√ji)

Compound type : nañ-tatpurusha (a+parājita)

• a – not, non-, un-
  indeclinable
• parājita – conquered, defeated
  adjective (masculine)
  Past Passive Participle
  From parā-√ji
  Prefix: parā
  Root: ji (class 1)

नृत्यन् (nṛtyan) - dancing

(adjective)

Nominative, masculine, singular of nṛtyat

nṛtyat - dancing, one who is dancing

Present Active Participle

Derived from root √nṛt (class 4) in the active voice

Root: nṛt (class 4)

इव (iva) - like, as if, as

(indeclinable)

नरव्याघ्रः (naravyāghraḥ) - tiger among men, best of men

(noun)

Nominative, masculine, singular of naravyāghra

naravyāghra - tiger among men, excellent man, foremost of men

Compound type : tatpurusha (nara+vyāghra)

• nara – man, person, human
  noun (masculine)
• vyāghra – tiger
  noun (masculine)

रथमार्गेषु (rathamārgeṣu) - in the chariot paths/tracks

(noun)

Locative, masculine, plural of rathamārga

rathamārga - chariot path, road for chariots

Compound type : tatpurusha (ratha+mārga)

• ratha – chariot
  noun (masculine)
• mārga – path, way, road
  noun (masculine)

वीर्यवान् (vīryavān) - mighty, powerful, valorous

(adjective)

Nominative, masculine, singular of vīryavat

vīryavat - possessed of strength/valor, mighty, powerful, energetic

Derived from 'vīrya' (valor) with possessive suffix '-vat'