योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-79, verse-21

न कदाचिज्जगन्नाशो देहोद्भूतगुणादिकम् ।
मदशक्तिरिव ज्ञप्तिरुदेतीति च वक्षि चेत् ॥ २१ ॥

na kadācijjagannāśo dehodbhūtaguṇādikam ,
madaśaktiriva jñaptirudetīti ca vakṣi cet 21

21. na kadācit jagannāśaḥ dehodbhūtaguṇādikam
madaśaktiḥ iva jñaptiḥ udeti iti ca vakṣi cet

21. cet vakṣi iti jagannāśaḥ na kadācit ca jñaptiḥ
dehodbhūtaguṇādikam madaśaktiḥ iva udeti

21. If you contend that there is never a dissolution of the world (jagat), and that consciousness (jñapti) arises from the qualities and other attributes originating in the body, much like the power of intoxication (mada-śakti) does, then...

Words meanings summery:

• न (na) - not (not, no)

• कदाचित् (kadācit) - ever (in combination with na, meaning "never") (ever, at any time, sometimes)

• जगन्नाशः (jagannāśaḥ) - dissolution of the world (destruction of the world, dissolution of the universe)

• देहोद्भूतगुणादिकम् (dehodbhūtaguṇādikam) - from the qualities and other attributes originating in the body (qualities etc. arisen from the body)

• मदशक्तिः (madaśaktiḥ) - the power of intoxication (power of intoxication)

• इव (iva) - much like (like, as, as if)

• ज्ञप्तिः (jñaptiḥ) - consciousness (knowledge, understanding, consciousness)

• उदेति (udeti) - arises (arises, comes forth, rises)

• इति (iti) - thus (thus, so, in this way)

• च (ca) - and (and, also)

• वक्षि (vakṣi) - you contend (you say, you speak)

• चेत् (cet) - if

Words meanings and morphology

न (na) - not (not, no)

(indeclinable)

कदाचित् (kadācit) - ever (in combination with na, meaning "never") (ever, at any time, sometimes)

(indeclinable)

From kadā (when) + cit (an indefinite particle).

जगन्नाशः (jagannāśaḥ) - dissolution of the world (destruction of the world, dissolution of the universe)

(noun)

Nominative, masculine, singular of jagannāśa

jagannāśa - destruction of the world, universal dissolution

Compound type : tatpurusha (jagat+nāśa)

• jagat – world, universe, what moves
  noun (neuter)
  present active participle
  From root gam.
  Root: gam (class 1)
• nāśa – destruction, loss, ruin, perishing
  noun (masculine)
  From root naś (to perish, to be lost).
  Root: naś (class 1)

Note: Subject of implied verb "is".

देहोद्भूतगुणादिकम् (dehodbhūtaguṇādikam) - from the qualities and other attributes originating in the body (qualities etc. arisen from the body)

(noun)

Nominative, neuter, singular of dehodbhūtaguṇādika

dehodbhūtaguṇādika - qualities etc. arisen from the body

Compound.

Compound type : tatpurusha (deha+udbhūta+guṇa+ādika)

• deha – body, form, person
  noun (masculine)
  Root: dih (class 1)
• udbhūta – arisen, produced, manifest
  adjective (neuter)
  past passive participle
  From ud + root bhū.
  Prefix: ud
  Root: bhū (class 1)
• guṇa – quality, attribute, constituent, strand
  noun (masculine)
• ādika – beginning with, and so on, etcetera
  adjective (neuter)
  From ādi (beginning) + ka suffix.

Note: The ending -am suggests an accusative case used adverbially, or nominative neuter referring to jñaptiḥ as something that arises from this, or as a general phenomenon. Contextually, it's the source from which jñaptiḥ arises.

मदशक्तिः (madaśaktiḥ) - the power of intoxication (power of intoxication)

(noun)

Nominative, feminine, singular of madaśakti

madaśakti - power of intoxication, intoxicating faculty

Compound of mada (intoxication) and śakti (power).

Compound type : tatpurusha (mada+śakti)

• mada – intoxication, exhilaration, passion, pride
  noun (masculine)
  From root mad (to be joyful, to be intoxicated).
  Root: mad (class 4)
• śakti – power, strength, faculty, energy
  noun (feminine)
  From root śak (to be able).
  Root: śak (class 5)

इव (iva) - much like (like, as, as if)

(indeclinable)

Particle of comparison.

ज्ञप्तिः (jñaptiḥ) - consciousness (knowledge, understanding, consciousness)

(noun)

Nominative, feminine, singular of jñapti

jñapti - knowledge, understanding, perception, consciousness

From root jñā (to know).

Root: jñā (class 9)

Note: Subject of udeti.

उदेति (udeti) - arises (arises, comes forth, rises)

(verb)

3rd person , singular, active, present indicative (laṭ) of i

Present active indicative 3rd person singular

From ud + root i.

Prefix: ud

Root: i (class 2)

इति (iti) - thus (thus, so, in this way)

(indeclinable)

च (ca) - and (and, also)

(indeclinable)

Conjunction.

वक्षि (vakṣi) - you contend (you say, you speak)

(verb)

2nd person , singular, active, present indicative (laṭ) of vac

Present active indicative 2nd person singular

Root vac (to speak), undergoes irregular strengthening in certain forms.

Root: vac (class 2)

चेत् (cet) - if

(indeclinable)

Conditional particle.