योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-60, verse-7

समदर्शनया नित्यं वृत्त्याऽचापलधीरया ।
अन्तःशीतलया रेजे परिपूर्णार्णवेन्दुवत् ॥ ७ ॥

samadarśanayā nityaṃ vṛttyā'cāpaladhīrayā ,
antaḥśītalayā reje paripūrṇārṇavenduvat 7

7. samadarśanayā nityam vṛttyā acāpaladhīrayā
antaḥśītalayā reje paripūrṇārṇavenduvat

7. (saḥ) nityam samadarśanayā acāpaladhīrayā
antaḥśītalayā vṛttyā paripūrṇārṇavenduvat reje

7. He shone splendidly, always, with an equanimous outlook, a steady and unwavering disposition, and inner serenity, like the full moon reflected in a calm ocean.

Words meanings summery:

• समदर्शनया (samadarśanayā) - by an equanimous vision, by equal perception

• नित्यम् (nityam) - always, constantly, perpetually

• वृत्त्या (vṛttyā) - by means of a disposition, by an attitude, by conduct

• अचापलधीरया (acāpaladhīrayā) - by an unwavering intellect, by a steady mind

• अन्तःशीतलया (antaḥśītalayā) - by inner coolness, by inner serenity

• रेजे (reje) - he shone, he appeared splendid, he was radiant

• परिपूर्णार्णवेन्दुवत् (paripūrṇārṇavenduvat) - like the full moon in the ocean

Words meanings and morphology

समदर्शनया (samadarśanayā) - by an equanimous vision, by equal perception

(noun)

Instrumental, feminine, singular of samadarśana

samadarśana - equanimous vision, equal perception

Compound type : tatpuruṣa (sama+darśana)

• sama – equal, same, even
  adjective
• darśana – seeing, vision, perception, doctrine
  noun (neuter)
  action noun
  Derived from root dṛś with suffix -ana
  Root: dṛś (class 1)

Note: Used here as an adjective in instrumental case, modifying vṛttyā.

नित्यम् (nityam) - always, constantly, perpetually

(indeclinable)

वृत्त्या (vṛttyā) - by means of a disposition, by an attitude, by conduct

(noun)

Instrumental, feminine, singular of vṛtti

vṛtti - mode of life, conduct, disposition, activity, subsistence, commentary

From root vṛt 'to exist, be, turn'

Root: vṛt (class 1)

अचापलधीरया (acāpaladhīrayā) - by an unwavering intellect, by a steady mind

(adjective)

Instrumental, feminine, singular of acāpaladhī

acāpaladhī - unwavering intellect, steady mind

Compound type : karmadhāraya (a+cāpala+dhī)

• a – not, non-, un-
  indeclinable
  Negation prefix
• cāpala – fickleness, unsteadiness, restlessness
  noun (neuter)
  Derived from capala (fickle)
• dhī – intellect, mind, thought, understanding
  noun (feminine)

Note: Adjective modifying vṛttyā.

अन्तःशीतलया (antaḥśītalayā) - by inner coolness, by inner serenity

(adjective)

Instrumental, feminine, singular of antaḥśītalā

antaḥśītalā - inner coolness, internal serenity (as an adjective, 'internally cool')

Compound type : karmadhāraya (antas+śītalā)

• antas – inside, interior, within
  indeclinable
• śītalā – cool, cold, calm, serene
  adjective (feminine)

Note: Adjective modifying vṛttyā.

रेजे (reje) - he shone, he appeared splendid, he was radiant

(verb)

3rd person , singular, middle, past perfect (lit) of rāj

Perfect tense (lit), middle voice.

Root: rāj (class 1)

परिपूर्णार्णवेन्दुवत् (paripūrṇārṇavenduvat) - like the full moon in the ocean

(indeclinable)

Formed with the suffix -vat (like, as).

Compound type : tatpuruṣa (paripūrṇa+arṇava+indu)

• paripūrṇa – completely full, perfect, complete
  adjective
  Past Passive Participle
  prefix pari- + root pṛ (to fill) + kta
  Prefix: pari
  Root: pṛ (class 3)
• arṇava – ocean, sea
  noun (masculine)
• indu – moon, drop
  noun (masculine)