महाभारतः mahābhārataḥ - book-1, chapter-55, verse-36

नातिभारो हि पार्थस्य केशवेनाभवत्सह ।
व्यवसायसहायस्य विष्णोः शत्रुवधेष्विव ॥३६॥

36. nātibhāro hi pārthasya keśavenābhavatsaha ,
vyavasāyasahāyasya viṣṇoḥ śatruvadheṣviva.

36. na atibhāraḥ hi pārthasya keśavena abhavat saha
vyavasāya-sahāyasya viṣṇoḥ śatru-vadheṣu iva

36. Indeed, for Pārtha, accompanied by Keśava, it was no excessive burden, just as it is for Viṣṇu, whose endeavors are supported, in the slaying of enemies.

Words meanings summery:

• न (na) - not, no

• अतिभारः (atibhāraḥ) - excessive burden, great weight

• हि (hi) - indeed, surely, for

• पार्थस्य (pārthasya) - of Pārtha, for Pārtha

• केशवेन (keśavena) - by Keśava, with Keśava

• अभवत् (abhavat) - it was (it was, it happened, he became)

• सह (saha) - with, together with

• व्यवसाय-सहायस्य (vyavasāya-sahāyasya) - for one whose undertakings are supported (of him whose undertaking is assisted, of him whose endeavor is aided)

• विष्णोः (viṣṇoḥ) - of Viṣṇu

• शत्रु-वधेषु (śatru-vadheṣu) - in the slaying of enemies

• इव (iva) - like, as, as if

Words meanings and morphology

न (na) - not, no

(indeclinable)

अतिभारः (atibhāraḥ) - excessive burden, great weight

(noun)

Nominative, masculine, singular of atibhāra

atibhāra - great burden, excessive weight, heavy load

Compound type : karmadhāraya (ati+bhāra)

• ati – over, beyond, excessive
  indeclinable
• bhāra – burden, weight, load
  noun (masculine)
  From root bhṛ (to bear)
  Root: bhṛ (class 3)

हि (hi) - indeed, surely, for

(indeclinable)

पार्थस्य (pārthasya) - of Pārtha, for Pārtha

(noun)

Genitive, masculine, singular of pārtha

pārtha - son of Pṛthā (Kuntī), Arjuna

patronymic from Pṛthā

केशवेन (keśavena) - by Keśava, with Keśava

(noun)

Instrumental, masculine, singular of keśava

keśava - name of Kṛṣṇa, Viṣṇu (having beautiful hair or killer of the demon Keśī)

अभवत् (abhavat) - it was (it was, it happened, he became)

(verb)

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

Root: bhū (class 1)

सह (saha) - with, together with

(indeclinable)

Note: Governs instrumental case (keśavena)

व्यवसाय-सहायस्य (vyavasāya-sahāyasya) - for one whose undertakings are supported (of him whose undertaking is assisted, of him whose endeavor is aided)

(adjective)

Genitive, masculine, singular of vyavasāya-sahāya

vyavasāya-sahāya - one whose undertaking/resolve is helped

Compound type : bahuvrīhi (vyavasāya+sahāya)

• vyavasāya – effort, undertaking, resolve, determination
  noun (masculine)
  action noun
  from root so (to finish, to destroy) with prefixes vi+ava
  Prefixes: vi+ava
  Root: so (class 4)
• sahāya – helper, aid, assistance
  noun (masculine)
  from root sah (to bear, endure)
  Root: sah (class 1)

विष्णोः (viṣṇoḥ) - of Viṣṇu

(noun)

Genitive, masculine, singular of viṣṇu

viṣṇu - name of a prominent Hindu deity, the Preserver

Root: viṣ (class 6)

शत्रु-वधेषु (śatru-vadheṣu) - in the slaying of enemies

(noun)

Locative, masculine, plural of śatru-vadha

śatru-vadha - slaying of enemies

Compound type : tatpuruṣa (śatru+vadha)

• śatru – enemy, foe
  noun (masculine)
  Root: śat
• vadha – killing, slaughter
  noun (masculine)
  action noun
  from root vadh (to strike, kill)
  Root: vadh (class 1)

इव (iva) - like, as, as if

(indeclinable)