योगवासिष्ठः yogavāsiṣṭhaḥ - book-2, chapter-15, verse-18

नित्यं शीतलया राम कुलङ्कपरिभिन्नया ।
पुरुषः शुद्धया वृत्त्या भाति पूर्णतयेन्दुवत् ॥ १८ ॥

nityaṃ śītalayā rāma kulaṅkaparibhinnayā ,
puruṣaḥ śuddhayā vṛttyā bhāti pūrṇatayenduvat 18

18. nityam śītalayā rāma kulaṅkaparibhinnayā
puruṣaḥ śuddhayā vṛttyā bhāti pūrṇatayā induvat

18. rāma,
puruṣaḥ nityam śītalayā kulaṅkaparibhinnayā śuddhayā vṛttyā pūrṇatayā induvat bhāti

18. O Rāma, an individual (puruṣa) who is endowed with a constantly serene and pure disposition (vṛtti), which completely eradicates all flaws, shines in their perfection, just like the full moon.

Words meanings summery:

• नित्यम् (nityam) - always, constantly, perpetually

• शीतलया (śītalayā) - by the serene (disposition) (by the cool, by the serene)

• राम (rāma) - O Rama

• कुलङ्कपरिभिन्नया (kulaṅkaparibhinnayā) - by which blemishes are completely removed

• पुरुषः (puruṣaḥ) - the individual (puruṣa) (the man, the person, the spirit)

• शुद्धया (śuddhayā) - by the pure (disposition) (by the pure, by the clean)

• वृत्त्या (vṛttyā) - by a pure disposition (by the disposition, by the conduct, by the state of being)

• भाति (bhāti) - he/she/it shines, appears, looks

• पूर्णतया (pūrṇatayā) - in their perfection (by fullness, by completeness, by perfection)

• इन्दुवत् (induvat) - like the moon, moon-like

Words meanings and morphology

नित्यम् (nityam) - always, constantly, perpetually

(indeclinable)

Note: Functions as an adverb here, modifying śītalayā.

शीतलया (śītalayā) - by the serene (disposition) (by the cool, by the serene)

(adjective)

Instrumental, feminine, singular of śītala

śītala - cool, cold, calm, serene

Root: śī (class 2)

Note: Agrees with vṛttyā.

राम (rāma) - O Rama

(proper noun)

Vocative, masculine, singular of rāma

rāma - Rama (a proper noun), delightful, pleasing

Root: ram (class 1)

कुलङ्कपरिभिन्नया (kulaṅkaparibhinnayā) - by which blemishes are completely removed

(adjective)

Instrumental, feminine, singular of kulaṅkaparibhinna

kulaṅkaparibhinna - completely free from blemish, all stains removed

Compound type : tatpurusha (kulaṅka+paribhinna)

• kulaṅka – blemish, defect, stain
  noun (masculine)
• paribhinna – pierced, rent, broken, completely removed/dispelled
  adjective (feminine)
  Past Passive Participle
  from root bhid (to break, pierce) with prefix pari
  Prefix: pari
  Root: bhid (class 7)

Note: Agrees with vṛttyā.

पुरुषः (puruṣaḥ) - the individual (puruṣa) (the man, the person, the spirit)

(noun)

Nominative, masculine, singular of puruṣa

puruṣa - man, person, male, human being, the Supreme Being, the cosmic person

Note: Subject of bhāti.

शुद्धया (śuddhayā) - by the pure (disposition) (by the pure, by the clean)

(adjective)

Instrumental, feminine, singular of śuddha

śuddha - pure, clean, clear, spotless

Past Passive Participle

formed from root śudh (to purify, be pure)

Root: śudh (class 4)

Note: Agrees with vṛttyā.

वृत्त्या (vṛttyā) - by a pure disposition (by the disposition, by the conduct, by the state of being)

(noun)

Instrumental, feminine, singular of vṛtti

vṛtti - state, condition, mode of being, conduct, disposition, subsistence

from root vṛt (to be, exist, turn)

Root: vṛt (class 1)

भाति (bhāti) - he/she/it shines, appears, looks

(verb)

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

Present Active Indicative

from root bhā (to shine)

Root: bhā (class 2)

पूर्णतया (pūrṇatayā) - in their perfection (by fullness, by completeness, by perfection)

(noun)

Instrumental, feminine, singular of pūrṇatā

pūrṇatā - fullness, completeness, perfection

from pūrṇa (full) + -tā (suffix for abstract noun)

इन्दुवत् (induvat) - like the moon, moon-like

(indeclinable)

from indu (moon) + -vat (suffix for 'like')