योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-122, verse-4

गम्भीरश्च प्रसन्नश्च गिराविव महाह्रदः ।
परानन्दरसाक्षुब्धो रमते स्वात्मनात्मनि ॥ ४ ॥

gambhīraśca prasannaśca girāviva mahāhradaḥ ,
parānandarasākṣubdho ramate svātmanātmani 4

4. gambhīraḥ ca prasannaḥ ca girau iva mahāhradaḥ
parānandarasākṣubdhaḥ ramate svātmanā ātmani

4. parānandarasākṣubdhaḥ gambhīraḥ ca prasannaḥ
ca girau iva mahāhradaḥ svātmanā ātmani ramate

4. Profound and tranquil, like a great lake on a mountain, he who is undisturbed by the essence of supreme bliss revels within the Self (ātman) through his own Self (ātman).

Words meanings summery:

• गम्भीरः (gambhīraḥ) - profound (in character/nature) (deep, profound, grave, serious)

• च (ca) - and (and, also, moreover)

• प्रसन्नः (prasannaḥ) - tranquil, serene (clear, tranquil, pleased, gracious, pure)

• च (ca) - and (and, also, moreover)

• गिरौ (girau) - on a mountain (on a mountain, in a mountain)

• इव (iva) - like (like, as, as if, similar to)

• महाह्रदः (mahāhradaḥ) - great lake (great lake, large pool)

• परानन्दरसाक्षुब्धः (parānandarasākṣubdhaḥ) - undisturbed by the essence of supreme bliss (one who is undisturbed by the essence of supreme bliss)

• रमते (ramate) - revels, delights (delights, plays, revels, rests)

• स्वात्मना (svātmanā) - through his own Self (ātman) (by one's own self)

• आत्मनि (ātmani) - within the Self (ātman) (in the self, in the soul, in the essence)

Words meanings and morphology

गम्भीरः (gambhīraḥ) - profound (in character/nature) (deep, profound, grave, serious)

(adjective)

Nominative, masculine, singular of gambhīra

gambhīra - deep, profound, grave, serious

च (ca) - and (and, also, moreover)

(indeclinable)

प्रसन्नः (prasannaḥ) - tranquil, serene (clear, tranquil, pleased, gracious, pure)

(adjective)

Nominative, masculine, singular of prasanna

prasanna - clear, tranquil, serene, pleased, gracious, pure

Past Passive Participle

From pra-√sad (to settle down, to be clear, to be pleased)

Prefix: pra

Root: sad (class 1)

च (ca) - and (and, also, moreover)

(indeclinable)

गिरौ (girau) - on a mountain (on a mountain, in a mountain)

(noun)

Locative, masculine, singular of giri

giri - mountain, hill

इव (iva) - like (like, as, as if, similar to)

(indeclinable)

महाह्रदः (mahāhradaḥ) - great lake (great lake, large pool)

(noun)

Nominative, masculine, singular of mahāhrada

mahāhrada - great lake, large pool

Compound type : tatpuruṣa (mahā+hrada)

• mahā – great, large, mighty
  adjective
• hrada – lake, pond, deep pool
  noun (masculine)

परानन्दरसाक्षुब्धः (parānandarasākṣubdhaḥ) - undisturbed by the essence of supreme bliss (one who is undisturbed by the essence of supreme bliss)

(adjective)

Nominative, masculine, singular of parānandarasākṣubdha

parānandarasākṣubdha - one for whom the essence of supreme bliss does not agitate, undisturbed by the bliss of the Supreme

Compound type : bahuvrīhi (para+ānanda+rasa+a-kṣubdha)

• para – supreme, highest, ultimate
  adjective
• ānanda – bliss, joy, happiness
  noun (masculine)
• rasa – essence, taste, juice, feeling, sentiment
  noun (masculine)
• a-kṣubdha – undisturbed, unagitated
  adjective
  Past Passive Participle (negative)
  Negative prefix 'a-' + past passive participle of √kṣubh
  Root: kṣubh (class 1)

Note: The long 'ā' is an internal sandhi within the Bahuvrihi compound.

रमते (ramate) - revels, delights (delights, plays, revels, rests)

(verb)

3rd person , singular, middle, present (laṭ) of ram

From √ram (to delight)

Root: ram (class 1)

Note: Often used reflexively or in middle voice to mean 'to delight oneself'.

स्वात्मना (svātmanā) - through his own Self (ātman) (by one's own self)

(noun)

Instrumental, masculine, singular of svātman

svātman - one's own self

Compound type : tatpuruṣa (sva+ātman)

• sva – one's own, self
  pronoun
• ātman – self, soul, essence, breath, mind
  noun (masculine)

Note: The long 'ā' is an internal sandhi within the compound.

आत्मनि (ātmani) - within the Self (ātman) (in the self, in the soul, in the essence)

(noun)

Locative, masculine, singular of ātman

ātman - self, soul, essence, breath, mind