महाभारतः mahābhārataḥ - book-1, chapter-201, verse-6

कृत्वा दीक्षां गतौ विन्ध्यं तत्रोग्रं तेपतुस्तपः ।
तौ तु दीर्घेण कालेन तपोयुक्तौ बभूवतुः ॥६॥

6. kṛtvā dīkṣāṁ gatau vindhyaṁ tatrograṁ tepatustapaḥ ,
tau tu dīrgheṇa kālena tapoyuktau babhūvatuḥ.

6. kṛtvā dīkṣāṃ gatau vindhyaṃ tatra ugraṃ tepatuḥ
tapaḥ tau tu dīrgheṇa kālena tapoyuktau babhūvatuḥ

6. After performing the initiation ritual, they went to the Vindhya mountains, where they performed severe asceticism (tapas). Those two remained engaged in their asceticism (tapas) for a long time.

Words meanings summery:

• कृत्वा (kṛtvā) - having done, having performed, having made

• दीक्षां (dīkṣāṁ) - initiation, consecration, ascetic vow

• गतौ (gatau) - gone, went

• विन्ध्यं (vindhyaṁ) - to the Vindhya mountains

• तत्र (tatra) - there, in that place

• उग्रं (ugraṁ) - severe, fierce, terrible

• तेपतुः (tepatuḥ) - they performed (asceticism)

• तपः (tapaḥ) - asceticism, austerity, heat, penance (tapas)

• तौ (tau) - those two

• तु (tu) - but, indeed, however

• दीर्घेण (dīrgheṇa) - by a long (time), for a long (time)

• कालेन (kālena) - by time, in time, for a period

• तपोयुक्तौ (tapoyuktau) - engaged in asceticism, absorbed in (tapas)

• बभूवतुः (babhūvatuḥ) - they became, they were

Words meanings and morphology

कृत्वा (kṛtvā) - having done, having performed, having made

(indeclinable)

Absolutive

Formed from root 'kṛ' (to do, to make) with suffix -tvā

Root: kṛ (class 8)

दीक्षां (dīkṣāṁ) - initiation, consecration, ascetic vow

(noun)

Accusative, feminine, singular of dīkṣā

dīkṣā - initiation, consecration, religious vow, ascetic discipline

गतौ (gatau) - gone, went

(adjective)

Nominative, masculine, dual of gata

gata - gone, moved, obtained, arrived at

Past Passive Participle

From root 'gam' (to go)

Root: gam (class 1)

विन्ध्यं (vindhyaṁ) - to the Vindhya mountains

(proper noun)

Accusative, masculine, singular of vindhya

vindhya - Vindhya (name of a mountain range in central India)

तत्र (tatra) - there, in that place

(indeclinable)

उग्रं (ugraṁ) - severe, fierce, terrible

(adjective)

Accusative, neuter, singular of ugra

ugra - severe, fierce, terrible, mighty

Note: Modifies 'tapas'

तेपतुः (tepatuḥ) - they performed (asceticism)

(verb)

3rd person , dual, active, perfect (liṭ) of tap

Perfect tense (liṭ), active voice, dual number

Root: tap (class 1)

तपः (tapaḥ) - asceticism, austerity, heat, penance (tapas)

(noun)

Accusative, neuter, singular of tapas

tapas - heat, warmth, pain, suffering, austerity, asceticism (tapas), penance

तौ (tau) - those two

(pronoun)

Nominative, masculine, dual of tad

tad - that, he, she, it

तु (tu) - but, indeed, however

(indeclinable)

दीर्घेण (dīrgheṇa) - by a long (time), for a long (time)

(adjective)

Instrumental, masculine, singular of dīrgha

dīrgha - long, tall, extensive

कालेन (kālena) - by time, in time, for a period

(noun)

Instrumental, masculine, singular of kāla

kāla - time, period, season

तपोयुक्तौ (tapoyuktau) - engaged in asceticism, absorbed in (tapas)

(adjective)

Nominative, masculine, dual of tapoyukta

tapoyukta - engaged in asceticism, absorbed in penance

Compound type : tatpuruṣa (tapas+yukta)

• tapas – asceticism, austerity (tapas)
  noun (neuter)
• yukta – joined, engaged, connected, endowed with
  adjective (neuter)
  Past Passive Participle
  From root 'yuj' (to join)
  Root: yuj (class 7)

बभूवतुः (babhūvatuḥ) - they became, they were

(verb)

3rd person , dual, active, perfect (liṭ) of bhū

Perfect tense (liṭ), active voice, dual number

Root: bhū (class 1)