योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-85, verse-100

पद्मिनीपल्लवाच्छन्ने गुप्ते मेरोर्गुहान्तरे ।
शीतले स्वर्धुनीतीरे तोयोन्मृष्टमले सुरैः ॥ १०० ॥

padminīpallavācchanne gupte merorguhāntare ,
śītale svardhunītīre toyonmṛṣṭamale suraiḥ 100

100. padminī-pallava-ācchanne gupte meruḥ-guhā-antare
śītale svar-dhunī-tīre toya-unmṛṣṭa-male suraiḥ

100. (tat sthānam) padminī-pallava-ācchanne suraiḥ gupte
meruḥ-guhā-antare śītale svar-dhunī-tīre toya-unmṛṣṭa-male

100. Covered with lotus sprouts, hidden by the gods (sura) in a cool cave within Mount Meru, on the bank of the heavenly river (svardhunī), its impurities cleansed by water.

Words meanings summery:

• पद्मिनी-पल्लव-आच्छन्ने (padminī-pallava-ācchanne) - covered with lotus sprouts

• गुप्ते (gupte) - hidden, concealed, protected

• मेरुः-गुहा-अन्तरे (meruḥ-guhā-antare) - in the interior of Meru's cave; in the cave interior of Meru

• शीतले (śītale) - cool, cold

• स्वर्-धुनी-तीरे (svar-dhunī-tīre) - on the bank of the heavenly river

• तोय-उन्मृष्ट-मले (toya-unmṛṣṭa-male) - whose impurities are cleansed by water; where dirt is washed away by water

• सुरैः (suraiḥ) - by the gods

Words meanings and morphology

पद्मिनी-पल्लव-आच्छन्ने (padminī-pallava-ācchanne) - covered with lotus sprouts

(adjective)

Locative, neuter, singular of padminī-pallava-ācchanna

padminī-pallava-ācchanna - covered with lotus leaves/sprouts

Compound type : tṛtīyā-tatpuruṣa (padminī-pallava+ācchanna)

• padminī-pallava – lotus sprout; sprout of a lotus plant
  noun (masculine)
• ācchanna – covered, concealed, clothed
  adjective
  Past Passive Participle
  Prefix: ā
  Root: chad (class 1)

गुप्ते (gupte) - hidden, concealed, protected

(adjective)

Locative, neuter, singular of gupta

gupta - hidden, protected, secret

Past Passive Participle

Root: gup (class 1)

मेरुः-गुहा-अन्तरे (meruḥ-guhā-antare) - in the interior of Meru's cave; in the cave interior of Meru

(noun)

Locative, neuter, singular of meru-guhā-antara

meru-guhā-antara - interior of the Meru cave

Compound type : ṣaṣṭhī-tatpuruṣa (meru+guhā-antara)

• meru – Mount Meru (mythical sacred mountain)
  proper noun (masculine)
• guhā-antara – interior of a cave
  noun (neuter)

शीतले (śītale) - cool, cold

(adjective)

Locative, neuter, singular of śītala

śītala - cool, cold, refreshing

स्वर्-धुनी-तीरे (svar-dhunī-tīre) - on the bank of the heavenly river

(noun)

Locative, neuter, singular of svar-dhunī-tīra

svar-dhunī-tīra - bank of the heavenly river

Compound type : ṣaṣṭhī-tatpuruṣa (svar-dhunī+tīra)

• svar-dhunī – heavenly river (i.e., Gaṅgā)
  noun (feminine)
• tīra – bank, shore, edge
  noun (neuter)

तोय-उन्मृष्ट-मले (toya-unmṛṣṭa-male) - whose impurities are cleansed by water; where dirt is washed away by water

(adjective)

Locative, neuter, singular of toya-unmṛṣṭa-mala

toya-unmṛṣṭa-mala - impurity cleansed by water

Compound type : bahuvrīhi (toya+unmṛṣṭa+mala)

• toya – water
  noun (neuter)
  Root: tu (class 1)
• unmṛṣṭa – wiped away, cleansed, polished
  adjective
  Past Passive Participle
  Prefix: ud
  Root: mṛj (class 2)
• mala – dirt, impurity, stain
  noun (masculine)

सुरैः (suraiḥ) - by the gods

(noun)

Instrumental, masculine, plural of sura

sura - god, deity