महाभारतः mahābhārataḥ - book-3, chapter-129, verse-13

एतत्प्लक्षावतरणं यमुनातीर्थमुच्यते ।
एतद्वै नाकपृष्ठस्य द्वारमाहुर्मनीषिणः ॥१३॥

13. etatplakṣāvataraṇaṁ yamunātīrthamucyate ,
etadvai nākapṛṣṭhasya dvāramāhurmanīṣiṇaḥ.

13. etat plakṣa avataraṇam yamunātīrtham ucyate
etat vai nākapṛṣṭhasya dvāram āhuḥ manīṣiṇaḥ

13. This place is called Plakṣāvataraṇa, a sacred ford on the Yamunā. Indeed, the wise (manīṣiṇas) declare this to be the gateway to the heavenly realm (nākapṛṣṭha).

Words meanings summery:

• एतत् (etat) - Referring to the specific location being discussed. (this, that)

• प्लक्ष (plakṣa) - Refers to a specific holy place associated with the Plakṣa tree. (Plakṣa tree (Ficus infectoria); a specific sacred tree)

• अवतरणम् (avataraṇam) - A specific holy place known as 'Plakṣāvataraṇa', signifying a place where the Plakṣa tree 'descended' or where one descends to bath. (descent, landing, place of descent, bathing place)

• यमुनातीर्थम् (yamunātīrtham) - This describes the nature of Plakṣāvataraṇa, a holy spot on the Yamunā. (a sacred ford/bathing place on the Yamunā river)

• उच्यते (ucyate) - is said, is called, is declared

• एतत् (etat) - Referring to the same location mentioned previously. (this, that)

• वै (vai) - Emphatic particle. (indeed, surely, truly, verily)

• नाकपृष्ठस्य (nākapṛṣṭhasya) - of the heaven, of the celestial realm, of the firmament

• द्वारम् (dvāram) - gate, door, entrance

• आहुः (āhuḥ) - they say, they declare, they speak

• मनीषिणः (manīṣiṇaḥ) - The knowledgeable authorities. (the wise, the sagacious ones, thinkers)

Words meanings and morphology

एतत् (etat) - Referring to the specific location being discussed. (this, that)

(pronoun)

Nominative, neuter, singular of etad

etad - this, that

Note: Subject of 'ucyate'.

प्लक्ष (plakṣa) - Refers to a specific holy place associated with the Plakṣa tree. (Plakṣa tree (Ficus infectoria); a specific sacred tree)

(noun)

Nominative, masculine, singular of plakṣa

plakṣa - the wavy-leaved fig tree (Ficus infectoria); a specific sacred tree or place

Note: Part of the compound `Plakṣāvataraṇam`.

अवतरणम् (avataraṇam) - A specific holy place known as 'Plakṣāvataraṇa', signifying a place where the Plakṣa tree 'descended' or where one descends to bath. (descent, landing, place of descent, bathing place)

(noun)

Nominative, neuter, singular of avataraṇa

avataraṇa - descent, alighting, landing, a place of descent, a bathing place, a ford

Nominalization from verb 'ava-tṛ' (to descend)

From 'ava' (down) + root 'tṛ' (to cross, pass over) with suffix '-ana'.

Prefix: ava

Root: tṛ (class 1)

Note: Forms a compound with `Plakṣa`.

यमुनातीर्थम् (yamunātīrtham) - This describes the nature of Plakṣāvataraṇa, a holy spot on the Yamunā. (a sacred ford/bathing place on the Yamunā river)

(noun)

Nominative, neuter, singular of yamunātīrtha

yamunātīrtha - a sacred bathing place or ford (tīrtha) on the Yamunā river

Compound type : tatpuruṣa (yamunā+tīrtha)

• yamunā – the Yamunā river (a sacred river in India)
  proper noun (feminine)
• tīrtha – a sacred bathing place, a ford, a holy place, a place of pilgrimage
  noun (neuter)

Note: Predicate nominative for `etat`.

उच्यते (ucyate) - is said, is called, is declared

(verb)

3rd person , singular, passive, present (laṭ) of vac

Present Passive, Third Person Singular, Ātmanepada

From root 'vac' (to speak) in 2nd conjugation. Passive form 'ucyate' for 3rd person singular present.

Root: vac (class 2)

एतत् (etat) - Referring to the same location mentioned previously. (this, that)

(pronoun)

Nominative, neuter, singular of etad

etad - this, that

Note: Subject of `āhuḥ` (indirectly, as `dvāram` is the direct object).

वै (vai) - Emphatic particle. (indeed, surely, truly, verily)

(indeclinable)

नाकपृष्ठस्य (nākapṛṣṭhasya) - of the heaven, of the celestial realm, of the firmament

(noun)

Genitive, neuter, singular of nākapṛṣṭha

nākapṛṣṭha - the surface or back of the sky; the highest heaven, celestial region, firmament

Compound type : tatpuruṣa (nāka+pṛṣṭha)

• nāka – heaven, sky, atmosphere
  noun (masculine)
  Negation of 'āka' (evil/suffering), so 'no suffering'.
• pṛṣṭha – back, surface, top, summit
  noun (neuter)

Note: Possessive, 'of the heavenly realm'.

द्वारम् (dvāram) - gate, door, entrance

(noun)

Accusative, neuter, singular of dvāra

dvāra - gate, door, entrance, passage

Note: Object of `āhuḥ`.

आहुः (āhuḥ) - they say, they declare, they speak

(verb)

3rd person , plural, active, present (lit / laṭ) of ah

Present/Perfect, Third Person Plural, Parasmaipada (irregular root, often treated as perfect)

Irregular root 'ah' with perfect-like forms used for present meaning. 3rd person plural.

Root: ah (class 2)

Note: Used idiomatically for 'it is said by'.

मनीषिणः (manīṣiṇaḥ) - The knowledgeable authorities. (the wise, the sagacious ones, thinkers)

(noun)

Nominative, masculine, plural of manīṣin

manīṣin - wise, sagacious, intelligent; a sage, a wise man, a thinker

From 'manīṣā' (wisdom) + suffix '-in'.

Note: Subject of `āhuḥ`.