योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-81, verse-90

अग्निर्धूमतया भागाद्यां प्रयाति पयोदताम् ।
सद्रूपपरिणामेन तदग्निः सोमकारणम् ॥ ९० ॥

agnirdhūmatayā bhāgādyāṃ prayāti payodatām ,
sadrūpapariṇāmena tadagniḥ somakāraṇam 90

90. agniḥ dhūmatayā bhāgāt yām prayāti payodatām |
sat-rūpa-pariṇāmena tat agniḥ soma-kāraṇam ||

90. agniḥ dhūmatayā bhāgāt yām payodatām prayāti
tat agniḥ sat-rūpa-pariṇāmena soma-kāraṇam

90. The fire (agni), by transforming partly into smoke, attains the state of being a cloud. Through this transformation into a substantial form, that fire (agni) becomes the cause of Soma (soma).

Words meanings summery:

• अग्निः (agniḥ) - fire (agni)

• धूमतया (dhūmatayā) - by means of smoke, in the form of smoke

• भागात् (bhāgāt) - from a part, by division, in part

• याम् (yām) - which (feminine accusative singular)

• प्रयाति (prayāti) - goes towards, attains, reaches

• पयोदताम् (payodatām) - the state of being a cloud

• सत्-रूप-परिणामेन (sat-rūpa-pariṇāmena) - by transformation into a substantial/real form

• तत् (tat) - that (neuter nominative/accusative singular)

• अग्निः (agniḥ) - fire (agni)

• सोम-कारणम् (soma-kāraṇam) - cause of Soma (soma)

Words meanings and morphology

अग्निः (agniḥ) - fire (agni)

(noun)

Nominative, masculine, singular of agni

agni - fire, the deity Agni

धूमतया (dhūmatayā) - by means of smoke, in the form of smoke

(noun)

Instrumental, feminine, singular of dhūmatā

dhūmatā - state of being smoke, smokiness

Derived from dhūma (smoke) + tā (suffix for state/quality).

भागात् (bhāgāt) - from a part, by division, in part

(noun)

Ablative, masculine, singular of bhāga

bhāga - part, portion, share, division

Root: bhaj (class 1)

याम् (yām) - which (feminine accusative singular)

(pronoun)

Accusative, feminine, singular of yad

yad - which, what

प्रयाति (prayāti) - goes towards, attains, reaches

(verb)

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

Prefix: pra

Root: yā (class 2)

पयोदताम् (payodatām) - the state of being a cloud

(noun)

Accusative, feminine, singular of payodatā

payodatā - the state or quality of being a cloud

Compound type : tatpuruṣa (payoda+tā)

• payoda – cloud (giver of water)
  noun (masculine)
• tā – suffix indicating state or quality
  suffix (feminine)

सत्-रूप-परिणामेन (sat-rūpa-pariṇāmena) - by transformation into a substantial/real form

(noun)

Instrumental, masculine, singular of sat-rūpa-pariṇāma

sat-rūpa-pariṇāma - transformation into a real or substantial form

Compound type : tatpuruṣa (sat+rūpa+pariṇāma)

• sat – existent, real, good, true
  adjective
  Present Active Participle
  Present active participle of the root as (to be).
  Root: as (class 2)
• rūpa – form, shape, nature, beauty
  noun (neuter)
• pariṇāma – transformation, change, evolution, maturation
  noun (masculine)
  Prefix: pari
  Root: nam (class 1)

तत् (tat) - that (neuter nominative/accusative singular)

(pronoun)

Nominative, neuter, singular of tad

tad - that, this

अग्निः (agniḥ) - fire (agni)

(noun)

Nominative, masculine, singular of agni

agni - fire, the deity Agni

सोम-कारणम् (soma-kāraṇam) - cause of Soma (soma)

(noun)

Nominative, neuter, singular of soma-kāraṇa

soma-kāraṇa - cause of Soma

Compound type : ṣaṣṭhī-tatpuruṣa (soma+kāraṇa)

• soma – moon, Soma plant/drink, water, nectar
  noun (masculine)
• kāraṇa – cause, reason, instrument
  noun (neuter)
  Root: kṛ (class 8)