महाभारतः mahābhārataḥ - book-3, chapter-158, verse-52

अध्वन्यहमथापश्यमगस्त्यमृषिसत्तमम् ।
उग्रं तपस्तपस्यन्तं यमुनातीरमाश्रितम् ।
नानापक्षिगणाकीर्णं पुष्पितद्रुमशोभितम् ॥५२॥

52. adhvanyahamathāpaśyamagastyamṛṣisattamam ,
ugraṁ tapastapasyantaṁ yamunātīramāśritam ,
nānāpakṣigaṇākīrṇaṁ puṣpitadrumaśobhitam.

52. adhvani aham atha apaśyam agastyam
ṛṣisattamam ugram tapaḥ
tapasyantam yamunātīram āśritam
nānāpakṣigaṇākīrṇam puṣpitadrumaśobhitam

52. Then, on my way, I saw Agastya, the foremost among sages, practicing severe asceticism (tapas) while settled on the bank of the Yamunā. That place was teeming with various flocks of birds and graced by flowering trees.

Words meanings summery:

• अध्वनि (adhvani) - on the journey (on the road, on the path, on the way)

• अहम् (aham) - I

• अथ (atha) - then (then, thus, moreover)

• अपश्यम् (apaśyam) - I saw

• अगस्त्यम् (agastyam) - Agastya (proper name)

• ऋषिसत्तमम् (ṛṣisattamam) - the foremost among sages (the best of sages, most excellent sage)

• उग्रम् (ugram) - severe (severe, fierce, terrible)

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

• तपस्यन्तम् (tapasyantam) - performing austerity, practicing penance

• यमुनातीरम् (yamunātīram) - bank of Yamunā

• आश्रितम् (āśritam) - settled on (resorted to, settled in, dependent on)

• नानापक्षिगणाकीर्णम् (nānāpakṣigaṇākīrṇam) - teeming with various flocks of birds (filled with various flocks of birds)

• पुष्पितद्रुमशोभितम् (puṣpitadrumaśobhitam) - graced by flowering trees (adorned with flowering trees)

Words meanings and morphology

अध्वनि (adhvani) - on the journey (on the road, on the path, on the way)

(noun)

Locative, masculine, singular of adhvan

adhvan - road, path, journey

अहम् (aham) - I

(pronoun)

Nominative, singular of asmad

asmad - I, me

Note: Refers to Vaiśravaṇa.

अथ (atha) - then (then, thus, moreover)

(indeclinable)

अपश्यम् (apaśyam) - I saw

(verb)

1st person , singular, active, past imperfect (laṅ) of dṛś

Imperfect Active

Imperfect tense form from root dṛś (paśya- stem)

Root: dṛś (class 1)

अगस्त्यम् (agastyam) - Agastya (proper name)

(proper noun)

Accusative, masculine, singular of agastya

agastya - Agastya (name of a celebrated Vedic sage)

Note: Object of `apaśyam`.

ऋषिसत्तमम् (ṛṣisattamam) - the foremost among sages (the best of sages, most excellent sage)

(noun)

Accusative, masculine, singular of ṛṣisattama

ṛṣisattama - best of sages, most excellent sage

Compound type : tatpurusha (ṛṣi+sattama)

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

Note: Agrees with `agastyam`.

उग्रम् (ugram) - severe (severe, fierce, terrible)

(adjective)

Accusative, neuter, singular of ugra

ugra - fierce, severe, formidable

Note: Agrees with `tapaḥ`.

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

(noun)

Accusative, neuter, singular of tapas

tapas - heat, asceticism, penance, religious austerity

Root: tap (class 1)

Note: Object of `tapasyantam`.

तपस्यन्तम् (tapasyantam) - performing austerity, practicing penance

(adjective)

Accusative, masculine, singular of tapasyant

tapasyant - performing asceticism

Present Active Participle

from denominative root tapasyā (to perform tapas)

Root: tapas (class 0)

Note: Agrees with `agastyam`.

यमुनातीरम् (yamunātīram) - bank of Yamunā

(noun)

Accusative, neuter, singular of yamunātīra

yamunātīra - bank of the Yamunā river

Compound type : tatpurusha (yamunā+tīra)

• yamunā – Yamunā (name of a sacred river)
  proper noun (feminine)
• tīra – bank, shore, edge
  noun (neuter)

Note: Object of `āśritam`.

आश्रितम् (āśritam) - settled on (resorted to, settled in, dependent on)

(adjective)

Accusative, masculine, singular of āśrita

āśrita - resorted to, dependent on, occupying

Past Passive Participle

from root śri (to lean on, to resort to) with upasarga ā-

Prefix: ā

Root: śri (class 1)

Note: Agrees with `agastyam`.

नानापक्षिगणाकीर्णम् (nānāpakṣigaṇākīrṇam) - teeming with various flocks of birds (filled with various flocks of birds)

(adjective)

Accusative, neuter, singular of nānāpakṣigaṇākīrṇa

nānāpakṣigaṇākīrṇa - crowded with various flocks of birds

Compound type : tatpurusha (nānāpakṣigaṇa+ākīrṇa)

• nānāpakṣigaṇa – flock of various birds
  noun (masculine)
• ākīrṇa – filled, crowded, covered
  adjective (neuter)
  Past Passive Participle
  from root kīr (to scatter) with upasarga ā-
  Prefix: ā
  Root: kīr (class 6)

Note: Agrees with `yamunātīram` (implied, describing the location).

पुष्पितद्रुमशोभितम् (puṣpitadrumaśobhitam) - graced by flowering trees (adorned with flowering trees)

(adjective)

Accusative, neuter, singular of puṣpitadrumaśobhita

puṣpitadrumaśobhita - adorned/beautified by flowering trees

Compound type : tatpurusha (puṣpitadruma+śobhita)

• puṣpitadruma – flowering tree
  noun (masculine)
• śobhita – adorned, beautified
  adjective (neuter)
  Past Passive Participle
  from root śubh (to shine, be beautiful)
  Root: śubh (class 1)

Note: Agrees with `yamunātīram`.