योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-116, verse-6

न दुःखान्यपब्रंहन्ति न वल्गन्ति सुखानि च ।
सर्वत्र समतोदेति हृदि शैत्यप्रदायिनी ॥ ६ ॥

na duḥkhānyapabraṃhanti na valganti sukhāni ca ,
sarvatra samatodeti hṛdi śaityapradāyinī 6

6. na duḥkhāni apabraṃhanti na valganti sukhāni
ca sarvatra samatā udeti hṛdi śaityapradāyinī

6. duḥkhāni na apabraṃhanti sukhāni ca na valganti
sarvatra hṛdi śaityapradāyinī samatā udeti

6. Sorrows do not intensify, nor do joys become boisterous. Everywhere, equanimity (samatā) arises in the heart, bringing coolness.

Words meanings summery:

• न (na) - not, no

• दुःखानि (duḥkhāni) - sorrows, pains, sufferings

• अपब्रंहन्ति (apabraṁhanti) - they grow strong, they increase, they swell up

• न (na) - not, no

• वल्गन्ति (valganti) - they leap, they exult, they become boisterous

• सुखानि (sukhāni) - joys, pleasures, happiness

• च (ca) - and, also, moreover

• सर्वत्र (sarvatra) - everywhere, in all places

• समता (samatā) - equanimity, equality, evenness

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

• हृदि (hṛdi) - in the heart, in the mind

• शैत्यप्रदायिनी (śaityapradāyinī) - bestowing coolness, granting serenity

Words meanings and morphology

न (na) - not, no

(indeclinable)

Negative particle

दुःखानि (duḥkhāni) - sorrows, pains, sufferings

(noun)

Nominative, neuter, plural of duḥkha

duḥkha - sorrow, pain, suffering, misery, discomfort

Note: Subject of 'apabraṃhanti'.

अपब्रंहन्ति (apabraṁhanti) - they grow strong, they increase, they swell up

(verb)

3rd person , plural, active, present (laṭ) of bṛṃh

Present Active

Prefix: apa

Root: bṛṃh (class 1)

न (na) - not, no

(indeclinable)

Negative particle

वल्गन्ति (valganti) - they leap, they exult, they become boisterous

(verb)

3rd person , plural, active, present (laṭ) of valg

Present Active

Root: valg (class 1)

सुखानि (sukhāni) - joys, pleasures, happiness

(noun)

Nominative, neuter, plural of sukha

sukha - joy, pleasure, happiness, comfort, ease

Note: Subject of 'valganti'.

च (ca) - and, also, moreover

(indeclinable)

Conjunction

सर्वत्र (sarvatra) - everywhere, in all places

(indeclinable)

Derived from sarva (all) + -tra (suffix for place)

समता (samatā) - equanimity, equality, evenness

(noun)

Nominative, feminine, singular of samatā

samatā - equality, evenness, equanimity, impartiality, sameness

Derived from sama (equal, same) + -tā (suffix forming feminine noun)

उदेति (udeti) - rises, appears, comes forth

(verb)

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

Present Active

Prefix: ud

Root: i (class 2)

हृदि (hṛdi) - in the heart, in the mind

(noun)

Locative, neuter, singular of hṛd

hṛd - heart, mind, soul, essence, breast

शैत्यप्रदायिनी (śaityapradāyinī) - bestowing coolness, granting serenity

(adjective)

Nominative, feminine, singular of śaityapradāyin

śaityapradāyin - bestowing coolness, granting serenity, yielding coldness

Agent noun/adjective from verbal root

Compound: śaitya (coolness) + pradāyin (giver, bestower). Derived from pra-√dā (to give, bestow) with suffix -in.

Compound type : upapada tatpuruṣa (śaitya+pradāyin)

• śaitya – coolness, coldness, frigidity
  noun (neuter)
  Derived from śīta (cold) + -ya
• pradāyin – giving, bestowing, yielding, causing
  adjective
  Agent noun/adjective from verbal root
  Derived from pra-√dā (to give, bestow) with suffix -in
  Prefix: pra
  Root: dā (class 3)

Note: Adjective for samatā.