योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-83, verse-22

अमृतापूरपूर्णेन नित्यानन्दमयेन च ।
स्थीयते पुरुषेणान्तः शीतेन शशिना यथा ॥ २२ ॥

amṛtāpūrapūrṇena nityānandamayena ca ,
sthīyate puruṣeṇāntaḥ śītena śaśinā yathā 22

22. amṛtāpūrapūrṇena nityānandamayena ca
sthīyate puruṣeṇa antaḥ śītena śaśinā yathā

22. antaḥ amṛtāpūrapūrṇena nityānandamayena ca puruṣeṇa sthīyate.
yathā śītena śaśinā.

22. Within, one is sustained by the (supreme cosmic) person (puruṣa), who is replete with a flood of nectar (amṛta) and constituted of eternal bliss (ānanda), just as one is cooled by the moon.

Words meanings summery:

• अमृतापूरपूर्णेन (amṛtāpūrapūrṇena) - filled with a flood of nectar (amṛta)

• नित्यानन्दमयेन (nityānandamayena) - consisting of eternal bliss (ānanda)

• च (ca) - and

• स्थीयते (sthīyate) - one is sustained/abides (passive voice) (one remains, it is stood, it is abided)

• पुरुषेण (puruṣeṇa) - by the supreme cosmic person (puruṣa) (by the person (puruṣa))

• अन्तः (antaḥ) - within, inside, inwardly

• शीतेन (śītena) - by the cool, by the cold

• शशिना (śaśinā) - by the moon

• यथा (yathā) - as, just as, in which way

Words meanings and morphology

अमृतापूरपूर्णेन (amṛtāpūrapūrṇena) - filled with a flood of nectar (amṛta)

(adjective)

Instrumental, masculine, singular of amṛtāpūrapūrṇa

amṛtāpūrapūrṇa - filled or replete with a flood/abundance of nectar

Compound type : tatpuruṣa (amṛta+āpūra+pūrṇa)

• amṛta – nectar, immortality
  noun (neuter)
• āpūra – flood, abundance, fullness
  noun (masculine)
  Prefix: ā
• pūrṇa – full, complete, filled
  adjective (masculine)
  Past Passive Participle
  Root: pṛ (class 9)

Note: Agrees with 'puruṣeṇa'.

नित्यानन्दमयेन (nityānandamayena) - consisting of eternal bliss (ānanda)

(adjective)

Instrumental, masculine, singular of nityānandamaya

nityānandamaya - consisting or made of eternal bliss

Compound type : tatpuruṣa (nitya+ānanda+maya)

• nitya – eternal, constant, perpetual
  adjective (masculine)
• ānanda – bliss, joy, happiness (ānanda)
  noun (masculine)
  Prefix: ā
• maya – consisting of, made of, full of
  suffix (masculine)
  Suffix forming adjectives indicating 'made of' or 'consisting of'.

Note: Agrees with 'puruṣeṇa'.

च (ca) - and

(indeclinable)

स्थीयते (sthīyate) - one is sustained/abides (passive voice) (one remains, it is stood, it is abided)

(verb)

3rd person , singular, passive, present (laṭ) of sthā

Root: sthā (class 1)

Note: The agent is in the instrumental case ('puruṣeṇa').

पुरुषेण (puruṣeṇa) - by the supreme cosmic person (puruṣa) (by the person (puruṣa))

(noun)

Instrumental, masculine, singular of puruṣa

puruṣa - man, human being, person, the supreme cosmic person (puruṣa)

Note: Agent in the passive construction.

अन्तः (antaḥ) - within, inside, inwardly

(indeclinable)

शीतेन (śītena) - by the cool, by the cold

(adjective)

Instrumental, masculine, singular of śīta

śīta - cold, cool, chill

Past Passive Participle

Root: śyai (class 1)

Note: Agrees with 'śaśinā'.

शशिना (śaśinā) - by the moon

(noun)

Instrumental, masculine, singular of śaśin

śaśin - moon (lit. having a hare/rabbit mark)

यथा (yathā) - as, just as, in which way

(indeclinable)