महाभारतः mahābhārataḥ - book-14, chapter-77, verse-45

स च वाजी यथेष्टेन तांस्तान्देशान्यथासुखम् ।
विचचार यथाकामं कर्म पार्थस्य वर्धयन् ॥४५॥

45. sa ca vājī yatheṣṭena tāṁstāndeśānyathāsukham ,
vicacāra yathākāmaṁ karma pārthasya vardhayan.

45. saḥ ca vājī yathā iṣṭena tān tān deśān yathā sukham
vicacāra yathā kāmam karma pārthasya vardhayan

45. And that horse wandered freely, at its will and comfort, through those various regions, thereby increasing Pārtha's (Arjuna's) deed (karma).

Words meanings summery:

• सः (saḥ) - that (horse) (he, that)

• च (ca) - and, also

• वाजी (vājī) - the (sacrificial) horse (horse, swift one)

• यथा (yathā) - as, according to, in such a way as

• इष्टेन (iṣṭena) - by its own desire/will (by what is desired, according to will, by desire)

• तान् (tān) - those

• तान् (tān) - those

• देशान् (deśān) - countries, regions, places

• यथा (yathā) - as, according to, in such a way as

• सुखम् (sukham) - comfortably, at ease (happiness, comfort, ease; happily, comfortably)

• विचचार (vicacāra) - wandered, roamed, moved about

• यथा (yathā) - as, according to, in such a way as

• कामम् (kāmam) - at will, according to its desire (desire, wish; according to wish, willingly)

• कर्म (karma) - the deed (of the horse-Vedic ritual, or the merit gained from it) (action, deed, work, ritual)

• पार्थस्य (pārthasya) - of Arjuna (of Pārtha, of Arjuna)

• वर्धयन् (vardhayan) - increasing (the merit/scope of) Pārtha's deed (increasing, causing to grow, promoting)

Words meanings and morphology

सः (saḥ) - that (horse) (he, that)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

च (ca) - and, also

(indeclinable)

वाजी (vājī) - the (sacrificial) horse (horse, swift one)

(noun)

Nominative, masculine, singular of vājin

vājin - horse, swift, strong, powerful

From vāja (strength, speed) + -in (possessing)

यथा (yathā) - as, according to, in such a way as

(indeclinable)

इष्टेन (iṣṭena) - by its own desire/will (by what is desired, according to will, by desire)

(noun)

Instrumental, neuter, singular of iṣṭa

iṣṭa - desired, wished, agreeable; offering, sacrifice

Past Passive Participle

From root √iṣ (to wish, desire)

Root: iṣ (class 4)

तान् (tān) - those

(pronoun)

Accusative, masculine, plural of tad

tad - that, he, she, it

Note: Used twice for emphasis: 'those very, those various'

तान् (tān) - those

(pronoun)

Accusative, masculine, plural of tad

tad - that, he, she, it

Note: Used twice for emphasis: 'those very, those various'

देशान् (deśān) - countries, regions, places

(noun)

Accusative, masculine, plural of deśa

deśa - country, region, place, spot

यथा (yathā) - as, according to, in such a way as

(indeclinable)

सुखम् (sukham) - comfortably, at ease (happiness, comfort, ease; happily, comfortably)

(indeclinable)

Note: Forms an adverbial phrase 'yathā sukham'.

विचचार (vicacāra) - wandered, roamed, moved about

(verb)

3rd person , singular, active, perfect (lit) of vicara

Perfect, 3rd Person, Singular, Active

Reduplicated perfect form of √car with prefix vi-

Prefix: vi

Root: car (class 1)

यथा (yathā) - as, according to, in such a way as

(indeclinable)

कामम् (kāmam) - at will, according to its desire (desire, wish; according to wish, willingly)

(indeclinable)

Note: Forms an adverbial phrase 'yathā kāmam'.

कर्म (karma) - the deed (of the horse-Vedic ritual, or the merit gained from it) (action, deed, work, ritual)

(noun)

Accusative, neuter, singular of karma

karma - action, deed, work, duty, religious rite, destiny (karma)

From root √kṛ (to do, make) + -man suffix

Root: kṛ (class 8)

पार्थस्य (pārthasya) - of Arjuna (of Pārtha, of Arjuna)

(proper noun)

Genitive, masculine, singular of pārtha

pārtha - son of Pṛthā (Kuntī); Arjuna

Derivative of Pṛthā

वर्धयन् (vardhayan) - increasing (the merit/scope of) Pārtha's deed (increasing, causing to grow, promoting)

(participle)

Nominative, masculine, singular of vardhayat

vardhayat - increasing, causing to grow

Present Active Participle (Causative)

From root √vṛdh (to grow, increase) in its causative form (vardhaya-)

Root: vṛdh (class 1)

Note: Modifies 'vājī'.