महाभारतः mahābhārataḥ - book-14, chapter-15, verse-10

स तमाश्वास्य विधिवद्विधानज्ञो महातपाः ।
अपहृत्यात्मनो भारं विशश्रामेव सात्वतः ॥१०॥

10. sa tamāśvāsya vidhivadvidhānajño mahātapāḥ ,
apahṛtyātmano bhāraṁ viśaśrāmeva sātvataḥ.

10. sa tam āśvāsya vidhivat vidhānajñaḥ mahātapaḥ
apahṛtya ātmanaḥ bhāram viśaśrāma iva sātvataḥ

10. saḥ vidhānajñaḥ mahātapaḥ sātvataḥ vidhivat tam
āśvāsya ātmanaḥ bhāram apahṛtya iva viśaśrāma

10. Having properly consoled him, that expert in sacred rules and one of great spiritual power (Krishna, the Sātvata), felt as if he had removed his own burden and then rested.

Words meanings summery:

• स (sa) - he

• तम् (tam) - Arjuna (him)

• आश्वास्य (āśvāsya) - having consoled, having comforted

• विधिवत् (vidhivat) - according to rule, properly, in due form

• विधानज्ञः (vidhānajñaḥ) - one who knows rules/ordinances/procedures, expert in sacred rites

• महातपः (mahātapaḥ) - of great austerities, of great spiritual power (tapas)

• अपहृत्य (apahṛtya) - having removed, having carried away

• आत्मनः (ātmanaḥ) - of the self, from himself

• भारम् (bhāram) - burden, weight

• विशश्राम (viśaśrāma) - he rested, he calmed down

• इव (iva) - as if, like, seemingly

• सात्वतः (sātvataḥ) - Krishna (the Satvata (an epithet of Krishna or one belonging to the Satvata clan))

Words meanings and morphology

स (sa) - he

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

Note: Refers to the Satvata (Krishna).

तम् (tam) - Arjuna (him)

(pronoun)

Accusative, masculine, singular of tad

tad - that, he, him

Note: Refers to Arjuna.

आश्वास्य (āśvāsya) - having consoled, having comforted

(indeclinable)

gerund/absolutive

From ā-√śvas (to breathe, to comfort)

Prefix: ā

Root: śvas (class 2)

Note: Preceding the main verb `viśaśrāma`.

विधिवत् (vidhivat) - according to rule, properly, in due form

(indeclinable)

from vidhi + -vat

Note: Modifies `āśvāsya`.

विधानज्ञः (vidhānajñaḥ) - one who knows rules/ordinances/procedures, expert in sacred rites

(adjective)

Nominative, masculine, singular of vidhānajña

vidhānajña - knowing what is proper, knowing rules/ordinances

Compound type : tatpurusha (vidhāna+jña)

• vidhāna – rule, ordinance, arrangement, ritual
  noun (neuter)
  From vi-√dhā (to place, arrange)
  Prefix: vi
  Root: dhā (class 3)
• jña – knowing, one who knows
  adjective (masculine)
  From root jñā (to know)
  Root: jñā (class 9)

Note: Qualifies `sa` (Krishna).

महातपः (mahātapaḥ) - of great austerities, of great spiritual power (tapas)

(adjective)

Nominative, masculine, singular of mahātapas

mahātapas - having great asceticism/spiritual power (tapas)

Compound type : bahuvrihi (mahā+tapas)

• mahā – great, large
  adjective
  stem form of mahat
• tapas – asceticism, spiritual fervor, heat (tapas)
  noun (neuter)
  From root tap (to heat, to perform penance)
  Root: tap (class 1)

Note: Qualifies `sa` (Krishna).

अपहृत्य (apahṛtya) - having removed, having carried away

(indeclinable)

gerund/absolutive

From apa-√hṛ (to take away, remove)

Prefix: apa

Root: hṛ (class 1)

Note: Preceding the main verb `viśaśrāma`.

आत्मनः (ātmanaḥ) - of the self, from himself

(noun)

Genitive, masculine, singular of ātman

ātman - self, soul, spirit, (ātman)

Root: an (class 2)

Note: With `bhāram`, meaning 'his own burden'.

भारम् (bhāram) - burden, weight

(noun)

Accusative, masculine, singular of bhāra

bhāra - burden, weight, responsibility

From root bhṛ (to bear)

Root: bhṛ (class 1)

Note: Object of `apahṛtya`.

विशश्राम (viśaśrāma) - he rested, he calmed down

(verb)

3rd person , singular, active, perfect (liṭ) of viśram

Perfect 3rd singular of vi-√śram (to rest)

Prefix: vi

Root: śram (class 4)

Note: Main verb.

इव (iva) - as if, like, seemingly

(indeclinable)

Note: Suggests a perceived or internal rest, rather than a literal physical rest.

सात्वतः (sātvataḥ) - Krishna (the Satvata (an epithet of Krishna or one belonging to the Satvata clan))

(proper noun)

Nominative, masculine, singular of sātvata

sātvata - belonging to the Satvata family, Krishna, Vishnu

Note: Subject of the sentence.