महाभारतः mahābhārataḥ - book-6, chapter-110, verse-30

यत्र पार्थो महाराज भीमसेनश्च पाण्डवः ।
कौरव्यस्य महासेनां जघ्नतुस्तौ महारथौ ॥३०॥

30. yatra pārtho mahārāja bhīmasenaśca pāṇḍavaḥ ,
kauravyasya mahāsenāṁ jaghnatustau mahārathau.

30. yatra pārthaḥ mahārāja bhīmasenaḥ ca pāṇḍavaḥ
kauravyasya mahāsenām jaghñatuḥ tau mahārathau

30. mahārāja yatra pārthaḥ pāṇḍavaḥ bhīmasenaḥ ca [āstām],
tau mahārathau kauravyasya mahāsenām jaghñatuḥ

30. O great king (mahārāja), where Partha and the Pandava Bhimasena were, those two great charioteers annihilated the vast army of the Kuru prince.

Words meanings summery:

• यत्र (yatra) - where, in which place

• पार्थः (pārthaḥ) - Arjuna (son of Pritha, Arjuna)

• महाराज (mahārāja) - O great king (address to Dhritarashtra) (great king, O great king)

• भीमसेनः (bhīmasenaḥ) - Bhimasena (Bhima) (Bhimasena, Bhima)

• च (ca) - and (and, also)

• पाण्डवः (pāṇḍavaḥ) - the Pandava (referring to Bhimasena or generally identifying them) (son of Pandu, a Pandava)

• कौरव्यस्य (kauravyasya) - of the Kuru prince (Duryodhana) (of the Kuru prince, of Duryodhana)

• महासेनाम् (mahāsenām) - vast army (great army, vast army)

• जघ्ञतुः (jaghñatuḥ) - they annihilated (they killed, they struck, they destroyed)

• तौ (tau) - those two

• महारथौ (mahārathau) - great charioteers

Words meanings and morphology

यत्र (yatra) - where, in which place

(indeclinable)

पार्थः (pārthaḥ) - Arjuna (son of Pritha, Arjuna)

(proper noun)

Nominative, masculine, singular of pārtha

pārtha - son of Pṛthā (Kunti), Arjuna

Derived from Pṛthā (Kunti) + aṇ (patronymic suffix)

महाराज (mahārāja) - O great king (address to Dhritarashtra) (great king, O great king)

(noun)

Vocative, masculine, singular of mahārāja

mahārāja - great king, emperor

Compound type : karmadhāraya (mahā+rājan)

• mahā – great, large, mighty
  adjective
• rājan – king, ruler
  noun (masculine)

Note: The form mahārāja can be nominative singular or vocative singular. Given the context (Bhagavad Gita style narrative, often addressed to Dhritarashtra), vocative is more appropriate.

भीमसेनः (bhīmasenaḥ) - Bhimasena (Bhima) (Bhimasena, Bhima)

(proper noun)

Nominative, masculine, singular of bhīmasena

bhīmasena - Bhima's army, or Bhima (who has a terrible army/force)

Compound type : tatpurusha/bahuvrihi (bhīma+senā)

• bhīma – terrible, formidable, dreadful; Bhima
  noun (masculine)
• senā – army, host, force
  noun (feminine)

च (ca) - and (and, also)

(indeclinable)

पाण्डवः (pāṇḍavaḥ) - the Pandava (referring to Bhimasena or generally identifying them) (son of Pandu, a Pandava)

(proper noun)

Nominative, masculine, singular of pāṇḍava

pāṇḍava - descendant of Pandu, a Pandava

Derived from Paṇḍu + aṇ (patronymic suffix)

Note: It qualifies Bhimasena, making it 'Bhimasena, the Pandava'.

कौरव्यस्य (kauravyasya) - of the Kuru prince (Duryodhana) (of the Kuru prince, of Duryodhana)

(proper noun)

Genitive, masculine, singular of kauravya

kauravya - descendant of Kuru, a Kuru prince (esp. Duryodhana)

Derived from Kuru + ya (patronymic suffix)

Note: Refers to Duryodhana.

महासेनाम् (mahāsenām) - vast army (great army, vast army)

(noun)

Accusative, feminine, singular of mahāsenā

mahāsenā - great army, large host

Compound type : karmadhāraya (mahā+senā)

• mahā – great, large, mighty
  adjective
• senā – army, host, force
  noun (feminine)

Note: Object of the verb 'jaghñatuḥ'.

जघ्ञतुः (jaghñatuḥ) - they annihilated (they killed, they struck, they destroyed)

(verb)

3rd person , dual, active, perfect (lit) of han

Root han (class 2, parasmaipada)

Root: han (class 2)

Note: Refers to Partha and Bhimasena.

तौ (tau) - those two

(pronoun)

Nominative, masculine, dual of tad

tad - that, those

Note: Refers to Partha and Bhimasena.

महारथौ (mahārathau) - great charioteers

(noun)

Nominative, masculine, dual of mahāratha

mahāratha - great charioteer, mighty warrior (who can fight 10,000 warriors)

Compound type : karmadhāraya (mahā+ratha)

• mahā – great, large, mighty
  adjective
• ratha – chariot; a warrior who fights from a chariot
  noun (masculine)

Note: Appositive to 'tau'.