महाभारतः mahābhārataḥ - book-5, chapter-118, verse-3

नागयक्षमनुष्याणां पतत्रिमृगपक्षिणाम् ।
शैलद्रुमवनौकानामासीत्तत्र समागमः ॥३॥

3. nāgayakṣamanuṣyāṇāṁ patatrimṛgapakṣiṇām ,
śailadrumavanaukānāmāsīttatra samāgamaḥ.

3. nāgayakṣamanuṣyāṇām patatrimṛgapakṣiṇām
śailadrumavanaukānām āsīt tatra samāgamaḥ

3. There, a gathering took place, comprising nāgas, yakṣas, humans, winged creatures, wild animals, birds, and those dwelling in mountains, trees, and forests.

Words meanings summery:

• नागयक्षमनुष्याणाम् (nāgayakṣamanuṣyāṇām) - of nāgas, yakṣas, and humans

• पतत्रिमृगपक्षिणाम् (patatrimṛgapakṣiṇām) - of winged creatures, wild animals, and birds

• शैलद्रुमवनौकानाम् (śailadrumavanaukānām) - of those dwelling in mountains, trees, and forests

• आसीत् (āsīt) - was, existed

• तत्र (tatra) - there, in that place

• समागमः (samāgamaḥ) - assembly, gathering, meeting

Words meanings and morphology

नागयक्षमनुष्याणाम् (nāgayakṣamanuṣyāṇām) - of nāgas, yakṣas, and humans

(noun)

Genitive, masculine, plural of nāgayakṣamanuṣya

nāgayakṣamanuṣya - nāgas, yakṣas, and humans

Compound type : dvandva (nāga+yakṣa+manuṣya)

• nāga – serpent deity, cobra
  noun (masculine)
• yakṣa – a class of nature spirits, often benevolent but sometimes mischievous
  noun (masculine)
• manuṣya – human, man
  noun (masculine)

पतत्रिमृगपक्षिणाम् (patatrimṛgapakṣiṇām) - of winged creatures, wild animals, and birds

(noun)

Genitive, masculine, plural of patatrimṛgapakṣin

patatrimṛgapakṣin - winged creatures, wild animals, and birds

Compound type : dvandva (patatrin+mṛga+pakṣin)

• patatrin – winged, bird, flying animal
  noun (masculine)
  derived from root 'pat' (to fall, fly) + -atrin suffix
  Root: pat (class 1)
• mṛga – deer, wild animal, beast
  noun (masculine)
• pakṣin – bird, winged creature
  noun (masculine)
  from root pakṣ 'to spread wings' or from pakṣa 'wing'
  Root: pakṣ (class 1)

शैलद्रुमवनौकानाम् (śailadrumavanaukānām) - of those dwelling in mountains, trees, and forests

(noun)

Genitive, masculine, plural of śailadrumavanaukā

śailadrumavanaukā - dwellers of mountains, trees, and forests

Compound type : dvandva-like enumeration (śaila+druma+vanaukas)

• śaila – relating to mountains, mountain, rock
  noun (masculine)
  derived from śilā 'rock' or śaila 'mountain'
• druma – tree
  noun (masculine)
  Root: dru
• vanaukas – forest-dweller
  noun (masculine)

आसीत् (āsīt) - was, existed

(verb)

3rd person , singular, active, past imperfect (laṅ) of as

imperfect

3rd person singular, active voice

Root: as (class 2)

तत्र (tatra) - there, in that place

(indeclinable)

समागमः (samāgamaḥ) - assembly, gathering, meeting

(noun)

Nominative, masculine, singular of samāgama

samāgama - assembly, gathering, meeting

derived from sam + ā + gam + a (nominal suffix)

Prefixes: sam+ā

Root: gam (class 1)