महाभारतः mahābhārataḥ - book-3, chapter-108, verse-7

तां प्रच्युतां ततो दृष्ट्वा देवाः सार्धं महर्षिभिः ।
गन्धर्वोरगरक्षांसि समाजग्मुर्दिदृक्षया ॥७॥

7. tāṁ pracyutāṁ tato dṛṣṭvā devāḥ sārdhaṁ maharṣibhiḥ ,
gandharvoragarakṣāṁsi samājagmurdidṛkṣayā.

7. tām pracyutām tataḥ dṛṣṭvā devāḥ sārdham maharṣibhiḥ
gandharvoragaraksāṃsi samājagmuḥ didṛkṣayā

7. Then, having seen her descending, the gods, accompanied by the great sages, Gandharvas, Uragas, and Rakshasas, all assembled with a desire to witness.

Words meanings summery:

• ताम् (tām) - her (Ganga) (her, that (feminine, accusative))

• प्रच्युताम् (pracyutām) - descending (fallen, descended, deviated)

• ततः (tataḥ) - then (then, thereafter, from that)

• दृष्ट्वा (dṛṣṭvā) - having seen

• देवाः (devāḥ) - the gods (gods, deities)

• सार्धम् (sārdham) - along with (together with, along with)

• महर्षिभिः (maharṣibhiḥ) - by the great sages (by/with great sages)

• गन्धर्वोरगरक्सांसि (gandharvoragaraksāṁsi) - Gandharvas, Uragas, and Rakshasas (Gandharvas, Uragas (serpents), and Rakshasas (demons))

• समाजग्मुः (samājagmuḥ) - they assembled (they assembled, came together)

• दिदृक्षया (didṛkṣayā) - with a desire to witness (with a desire to see, for the sake of seeing)

Words meanings and morphology

ताम् (tām) - her (Ganga) (her, that (feminine, accusative))

(pronoun)

Accusative, feminine, singular of tad

tad - that, she

Note: refers to Gaṅgā

प्रच्युताम् (pracyutām) - descending (fallen, descended, deviated)

(adjective)

Accusative, feminine, singular of pracyutā

pracyutā - fallen, descended, deviated

Past Passive Participle

feminine form of pracyuta, from root cyu (1P) 'to move, to fall' with upasarga pra

Prefix: pra

Root: cyu (class 1)

ततः (tataḥ) - then (then, thereafter, from that)

(indeclinable)

दृष्ट्वा (dṛṣṭvā) - having seen

(indeclinable)

Absolutive

from root dṛś (1P) 'to see', with suffix -tvā

Root: dṛś (class 1)

देवाः (devāḥ) - the gods (gods, deities)

(noun)

Nominative, masculine, plural of deva

deva - god, deity

Root: div (class 4)

सार्धम् (sārdham) - along with (together with, along with)

(indeclinable)

adverbial use of sārdha (with, accompanying)

महर्षिभिः (maharṣibhiḥ) - by the great sages (by/with great sages)

(noun)

Instrumental, masculine, plural of maharṣi

maharṣi - great sage, great seer

Compound type : karmadhāraya (mahā+ṛṣi)

• mahā – great, large
  adjective (feminine)
• ṛṣi – sage, seer
  noun (masculine)
  Root: ṛṣ

गन्धर्वोरगरक्सांसि (gandharvoragaraksāṁsi) - Gandharvas, Uragas, and Rakshasas (Gandharvas, Uragas (serpents), and Rakshasas (demons))

(noun)

Nominative, neuter, plural of gandharvoragaraksas

gandharvoragaraksas - Gandharvas, Uragas, and Rakshasas

Compound type : dvandva (gandharva+uraga+rakṣas)

• gandharva – celestial musician, Gandharva
  noun (masculine)
• uraga – serpent, Naga
  noun (masculine)
  Root: ṛj (class 1)
• rakṣas – demon, Rakshasa
  noun (neuter)
  Root: rakṣ (class 1)

Note: This is a Dvandva compound listing different types of celestial/mythical beings

समाजग्मुः (samājagmuḥ) - they assembled (they assembled, came together)

(verb)

3rd person , plural, active, perfect (lit) of gam

Perfect tense, 3rd person plural, active voice (Parasmaipada)

from root gam (1P) 'to go', with upasarga sam-ā

Prefixes: sam+ā

Root: gam (class 1)

दिदृक्षया (didṛkṣayā) - with a desire to witness (with a desire to see, for the sake of seeing)

(noun)

Instrumental, feminine, singular of didṛkṣā

didṛkṣā - desire to see

Desiderative noun

from desiderative stem of root dṛś (1P) 'to see', with -ā suffix

Root: dṛś (class 1)