महाभारतः mahābhārataḥ - book-3, chapter-95, verse-11

गङ्गाद्वारमथागम्य भगवानृषिसत्तमः ।
उग्रमातिष्ठत तपः सह पत्न्यानुकूलया ॥११॥

11. gaṅgādvāramathāgamya bhagavānṛṣisattamaḥ ,
ugramātiṣṭhata tapaḥ saha patnyānukūlayā.

11. gaṅgādvāram atha āgamya bhagavān ṛṣisattamaḥ
ugram ātiṣṭhata tapaḥ saha patnyā anukūlayā

11. Then, having arrived at Gangadvāra, the revered, excellent sage began to perform severe asceticism (tapas) along with his agreeable wife.

Words meanings summery:

• गङ्गाद्वारम् (gaṅgādvāram) - to Gangadvāra (modern Haridwar), a sacred pilgrimage site (to the gate of Ganga, to Gangadvāra)

• अथ (atha) - then, now, thereupon

• आगम्य (āgamya) - having come, having reached, having approached

• भगवान् (bhagavān) - the revered sage (revered, glorious, blessed)

• ऋषिसत्तमः (ṛṣisattamaḥ) - Agastya, the best of sages (best of sages, excellent sage)

• उग्रम् (ugram) - severe (asceticism) (severe, intense, fierce)

• आतिष्ठत (ātiṣṭhata) - he undertook (asceticism) (he undertook, he performed, he stood firm)

• तपः (tapaḥ) - severe asceticism (tapas) (asceticism, penance, spiritual heat)

• सह (saha) - with, along with

• पत्न्या (patnyā) - with his (Agastya's) wife (by the wife, with the wife)

• अनुकूलया (anukūlayā) - agreeable (wife) (agreeable, favorable, cooperative)

Words meanings and morphology

गङ्गाद्वारम् (gaṅgādvāram) - to Gangadvāra (modern Haridwar), a sacred pilgrimage site (to the gate of Ganga, to Gangadvāra)

(noun)

Accusative, neuter, singular of gaṅgādvāra

gaṅgādvāra - gate of the Ganga, Gangadvāra

Compound type : tatpurusha (gaṅgā+dvāra)

• gaṅgā – Ganga river
  proper noun (feminine)
• dvāra – gate, door, entrance
  noun (neuter)

अथ (atha) - then, now, thereupon

(indeclinable)

आगम्य (āgamya) - having come, having reached, having approached

(indeclinable)

gerund/absolutive

Derived from root gam with upasarga ā, forming a gerund (absolutive) to denote an action completed before the main verb.

Prefix: ā

Root: gam (class 1)

भगवान् (bhagavān) - the revered sage (revered, glorious, blessed)

(adjective)

Nominative, masculine, singular of bhagavat

bhagavat - illustrious, divine, glorious, venerable, lord

Note: Declined form of bhagavat, nominative singular masculine.

ऋषिसत्तमः (ṛṣisattamaḥ) - Agastya, the best of sages (best of sages, excellent sage)

(noun)

Nominative, masculine, singular of ṛṣisattama

ṛṣisattama - best among sages, most excellent sage

Compound type : tatpurusha (ṛṣi+sattama)

• ṛṣi – sage, seer
  noun (masculine)
• sattama – best, most excellent
  adjective (masculine)
  Superlative suffix -tama

उग्रम् (ugram) - severe (asceticism) (severe, intense, fierce)

(adjective)

Accusative, neuter, singular of ugra

ugra - fierce, terrible, severe, potent

Note: Agrees with tapaḥ (neuter).

आतिष्ठत (ātiṣṭhata) - he undertook (asceticism) (he undertook, he performed, he stood firm)

(verb)

3rd person , singular, middle, past imperfect (laṅ) of sthā

imperfect

Imperfect tense, third person singular, middle voice, from root sthā with upasarga ā.

Prefix: ā

Root: sthā (class 1)

तपः (tapaḥ) - severe asceticism (tapas) (asceticism, penance, spiritual heat)

(noun)

Accusative, neuter, singular of tapas

tapas - asceticism, penance, heat, spiritual fervor

सह (saha) - with, along with

(indeclinable)

पत्न्या (patnyā) - with his (Agastya's) wife (by the wife, with the wife)

(noun)

Instrumental, feminine, singular of patnī

patnī - wife, mistress, lady

Note: Governed by saha.

अनुकूलया (anukūlayā) - agreeable (wife) (agreeable, favorable, cooperative)

(adjective)

Instrumental, feminine, singular of anukūla

anukūla - agreeable, favorable, obliging, congenial

Note: Agrees with patnyā.