महाभारतः mahābhārataḥ - book-3, chapter-82, verse-51

अथ सुन्दरिकातीर्थं प्राप्य सिद्धनिषेवितम् ।
रूपस्य भागी भवति दृष्टमेतत्पुरातने ॥५१॥

51. atha sundarikātīrthaṁ prāpya siddhaniṣevitam ,
rūpasya bhāgī bhavati dṛṣṭametatpurātane.

51. atha sundarikātīrtham prāpya siddhaniṣevitam
rūpasya bhāgī bhavati dṛṣṭam etat purātane

51. Then, having arrived at Sundarikā-tīrtha, a sacred bathing place frequented by perfected beings (siddhas), one acquires beauty. This phenomenon was observed in ancient times.

Words meanings summery:

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

• सुन्दरिकातीर्थम् (sundarikātīrtham) - to the sacred bathing place (tirtha) named Sundarikā (to the sacred bathing place named Sundarikā)

• प्राप्य (prāpya) - having arrived at (having reached, having obtained)

• सिद्धनिषेवितम् (siddhaniṣevitam) - frequented by perfected beings (siddhas)

• रूपस्य (rūpasya) - of beauty (of form, of beauty)

• भागी (bhāgī) - one who acquires (beauty) (a sharer, partaker)

• भवति (bhavati) - becomes, acquires (becomes, is)

• दृष्टम् (dṛṣṭam) - observed (seen, observed)

• एतत् (etat) - this (phenomenon) (this)

• पुरातने (purātane) - in ancient times

Words meanings and morphology

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

(indeclinable)

सुन्दरिकातीर्थम् (sundarikātīrtham) - to the sacred bathing place (tirtha) named Sundarikā (to the sacred bathing place named Sundarikā)

(proper noun)

Accusative, neuter, singular of sundarikātīrtha

sundarikātīrtha - Sundarikā sacred bathing place

Compound type : tatpuruṣa (sundarikā+tīrtha)

• sundarikā – a beautiful woman; name of a place
  proper noun (feminine)
• tīrtha – ford, sacred bathing place, shrine
  noun (neuter)

प्राप्य (prāpya) - having arrived at (having reached, having obtained)

(indeclinable)

absolutive (gerund)

pra + āp + ya

Prefix: pra

Root: āp (class 5)

सिद्धनिषेवितम् (siddhaniṣevitam) - frequented by perfected beings (siddhas)

(adjective)

Accusative, neuter, singular of siddhaniṣevita

siddhaniṣevita - frequented by siddhas

Compound type : tatpuruṣa (siddha+niṣevita)

• siddha – accomplished, perfected, a perfected being, sage
  noun (masculine)
  Root: sidh (class 4)
• niṣevita – frequented, attended, resorted to
  adjective (neuter)
  Past Passive Participle
  ni + sev + kta
  Prefix: ni
  Root: sev (class 1)

Note: Qualifies 'sundarikātīrtham'.

रूपस्य (rūpasya) - of beauty (of form, of beauty)

(noun)

Genitive, neuter, singular of rūpa

rūpa - form, shape, beauty, appearance

भागी (bhāgī) - one who acquires (beauty) (a sharer, partaker)

(adjective)

Nominative, masculine, singular of bhāgin

bhāgin - possessing a share, sharer, partaker

from bhāga + ini

Note: Used substantively as the subject.

भवति (bhavati) - becomes, acquires (becomes, is)

(verb)

3rd person , singular, active, present (laṭ) of bhū

present active

3rd person singular, present tense

Root: bhū (class 1)

दृष्टम् (dṛṣṭam) - observed (seen, observed)

(adjective)

Nominative, neuter, singular of dṛṣṭa

dṛṣṭa - seen, observed, visible

Past Passive Participle

from root dṛś + kta

Root: dṛś (class 1)

Note: Qualifies 'etat'.

एतत् (etat) - this (phenomenon) (this)

(pronoun)

Nominative, neuter, singular of etad

etad - this, that

Note: Refers to the preceding statement.

पुरातने (purātane) - in ancient times

(adjective)

Locative, singular of purātana

purātana - ancient, old

Note: Used adverbially, likely modifying an implied 'kāle' (time).