योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-17, verse-52

पर्यन्तेषु प्रतीहारास्तस्थुर्धवलवाससः ।
ऋष्यमूकार्कतापार्तमेघमाला इवाद्रिषु ॥ ५२ ॥

paryanteṣu pratīhārāstasthurdhavalavāsasaḥ ,
ṛṣyamūkārkatāpārtameghamālā ivādriṣu 52

52. paryanteṣu pratīhārāḥ tasthuḥ dhavalavāsasaḥ
ṛṣyamūkārkatāpārtameghamālā iva adriṣu

52. pratīhārāḥ dhavalavāsasaḥ paryanteṣu tasthuḥ
iva ṛṣyamūkārkatāpārtameghamālā adriṣu

52. At the borders, the white-robed doorkeepers stood, resembling a cloud bank on mountains, afflicted by the sun's intense heat over the Ṛṣyamūka range.

Words meanings summery:

• पर्यन्तेषु (paryanteṣu) - on the borders; at the ends; in the extremities

• प्रतीहाराः (pratīhārāḥ) - doorkeepers, guards

• तस्थुः (tasthuḥ) - stood

• धवलवाससः (dhavalavāsasaḥ) - white-robed, wearing white garments

• ऋष्यमूकार्कतापार्तमेघमाला (ṛṣyamūkārkatāpārtameghamālā) - a row of clouds afflicted by the sun's heat of (Mount) Ṛṣyamūka

• इव (iva) - like, as if, similar to

• अद्रिषु (adriṣu) - on the mountains

Words meanings and morphology

पर्यन्तेषु (paryanteṣu) - on the borders; at the ends; in the extremities

(noun)

Locative, masculine, plural of paryanta

paryanta - border, extremity, end

प्रतीहाराः (pratīhārāḥ) - doorkeepers, guards

(noun)

Nominative, masculine, plural of pratīhāra

pratīhāra - doorkeeper, guard

तस्थुः (tasthuḥ) - stood

(verb)

3rd person , plural, active, perfect (lit) of √sthā

Perfect

Root verb, class 1 (P), perfect tense, 3rd person, plural

Root: sthā (class 1)

धवलवाससः (dhavalavāsasaḥ) - white-robed, wearing white garments

(adjective)

Nominative, masculine, plural of dhavalavāsas

dhavalavāsas - white-robed, having white garments

Compound type : Bahuvrīhi (dhavala+vāsas)

• dhavala – white, clean
  adjective
• vāsas – garment, clothing
  noun (neuter)

Note: Modifies 'pratīhārāḥ'

ऋष्यमूकार्कतापार्तमेघमाला (ṛṣyamūkārkatāpārtameghamālā) - a row of clouds afflicted by the sun's heat of (Mount) Ṛṣyamūka

(noun)

Nominative, feminine, singular of ṛṣyamūkārkatāpārtameghamālā

ṛṣyamūkārkatāpārtameghamālā - a row of clouds afflicted by the sun's heat of (Mount) Ṛṣyamūka

Compound type : Tatpuruṣa / Karmadhāraya (ṛṣyamūka+arkatāpa+ārta+meghamālā)

• ṛṣyamūka – Mount Ṛṣyamūka (a specific mountain mentioned in Rāmāyaṇa)
  proper noun (masculine)
• arkatāpa – sun's heat
  noun (masculine)
• ārta – afflicted, distressed, tormented
  adjective
  Past Passive Participle
  From √ṛ (to suffer, oppress)
  Root: ṛ (class 3)
• meghamālā – row of clouds, cloud-bank
  noun (feminine)

Note: Object of comparison with 'pratīhārāḥ'

इव (iva) - like, as if, similar to

(indeclinable)

अद्रिषु (adriṣu) - on the mountains

(noun)

Locative, masculine, plural of adri

adri - mountain, rock