योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-87, verse-4

निरर्गलरसो यत्र सामान्येन विजृम्भते ।
मुक्तरागादिमननं तत्कल्पनसुखावहम् ॥ ४ ॥

nirargalaraso yatra sāmānyena vijṛmbhate ,
muktarāgādimananaṃ tatkalpanasukhāvaham 4

4. nirargalarasaḥ yatra sāmānyena vijṛmbhate
muktarāgādimananam tatkalpanasukhāvaham

4. yatra nirargalarasaḥ sāmānyena vijṛmbhate,
muktarāgādimananam tat kalpanasukhāvaham

4. Where an unimpeded essence (rasa) universally unfolds, the contemplation (mananam) that is free from attachment (rāga) and other similar defilements, such an imaginative thought (kalpana) brings forth true happiness.

Words meanings summery:

• निरर्गलरसः (nirargalarasaḥ) - unimpeded essence, unrestrained sentiment

• यत्र (yatra) - where, in which

• सामान्येन (sāmānyena) - generally, commonly, universally

• विजृम्भते (vijṛmbhate) - expands, manifests, unfolds, becomes prominent

• मुक्तरागादिमननम् (muktarāgādimananam) - contemplation free from attachment and other defilements

• तत् (tat) - that (contemplation) (that)

• कल्पनसुखावहम् (kalpanasukhāvaham) - bringing happiness through imagination/conception

Words meanings and morphology

निरर्गलरसः (nirargalarasaḥ) - unimpeded essence, unrestrained sentiment

(noun)

Nominative, masculine, singular of nirargalarasa

nirargalarasa - unimpeded essence or sentiment

Compound type : karmadhāraya (nirargala+rasa)

• nirargala – unimpeded, unrestrained, unobstructed
  adjective
  Formed with 'nis' (without) and 'argala' (bolt/impediment).
  Prefix: nis
• rasa – essence, juice, taste, sentiment, emotion
  noun (masculine)
  Root: ras (class 1)

यत्र (yatra) - where, in which

(indeclinable)

सामान्येन (sāmānyena) - generally, commonly, universally

(adjective)

Instrumental, neuter, singular of sāmānya

sāmānya - common, general, universal, ordinary

Note: Used adverbially.

विजृम्भते (vijṛmbhate) - expands, manifests, unfolds, becomes prominent

(verb)

3rd person , singular, middle, present (lat) of vijṛmbh

Prefix: vi

Root: jṛmbh (class 1)

मुक्तरागादिमननम् (muktarāgādimananam) - contemplation free from attachment and other defilements

(noun)

Nominative, neuter, singular of muktarāgādimanana

muktarāgādimanana - contemplation free from attachment and similar defects

Compound type : tatpuruṣa (mukta+rāga+ādi+manana)

• mukta – freed, liberated, released
  adjective (masculine)
  Past Passive Participle
  Derived from the root 'muc' (to release, free).
  Root: muc (class 6)
• rāga – attachment, passion, affection, color
  noun (masculine)
  Root: rañj (class 1)
• ādi – beginning, and so on, etc.
  indeclinable
• manana – thinking, meditating, contemplating, reflection
  noun (neuter)
  verbal noun
  Derived from the root 'man' (to think).
  Root: man (class 4)

तत् (tat) - that (contemplation) (that)

(pronoun)

Nominative, neuter, singular of tad

tad - that, he, she, it

कल्पनसुखावहम् (kalpanasukhāvaham) - bringing happiness through imagination/conception

(adjective)

Nominative, neuter, singular of kalpanasukhāvaha

kalpanasukhāvaha - bringing about happiness through imagination/conception

Compound type : tatpuruṣa (kalpana+sukha+āvaha)

• kalpana – imagination, conception, creation, formation
  noun (feminine)
  Root: kḷp (class 1)
• sukha – happiness, pleasure, ease
  noun (neuter)
• āvaha – bringing, causing, producing, conducive to
  adjective (masculine)
  Derived from the root 'vah' with prefix 'ā'.
  Prefix: ā
  Root: vah (class 1)

Note: Agrees with 'mananam'.