योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-81, verse-55

मेरुर्नृत्यति लोलोच्चकुलाचलबृहद्भुजः ।
भ्रमदभ्रपटोपेतनमत्तनुतूनूरुहः ॥ ५५ ॥

merurnṛtyati loloccakulācalabṛhadbhujaḥ ,
bhramadabhrapaṭopetanamattanutūnūruhaḥ 55

55. meruḥ nṛtyati loloccakulācalabṛhadbhujaḥ
bhramadabhrapaṭopetanamattūnūruhaḥ

55. meruḥ loloccakulācalabṛhadbhujaḥ
bhramadabhrapaṭopetanamattūnūruhaḥ nṛtyati

55. Mount Meru dances, its vast, quivering arms being the lofty principal mountains, and its bending body-hairs (trees) enveloped by swirling cloud-garments.

Words meanings summery:

• मेरुः (meruḥ) - Mount Meru

• नृत्यति (nṛtyati) - dances, is dancing

• लोलोच्चकुलाचलबृहद्भुजः (loloccakulācalabṛhadbhujaḥ) - (Mount Meru's arms) (whose great arms are the quivering, lofty principal mountains)

• भ्रमदभ्रपटोपेतनमत्तूनूरुहः (bhramadabhrapaṭopetanamattūnūruhaḥ) - (Mount Meru's body-hairs/trees) (whose bending body-hairs (trees) are covered with a whirling cloud-garment)

Words meanings and morphology

मेरुः (meruḥ) - Mount Meru

(proper noun)

Nominative, masculine, singular of meru

meru - Mount Meru, a mythical mountain, abode of gods, central to Hindu cosmology

नृत्यति (nṛtyati) - dances, is dancing

(verb)

3rd person , singular, active, present (lat) of nṛt

Present Indicative

3rd person singular, present tense, parasmaipada, root nṛt (class 4)

Root: nṛt (class 4)

लोलोच्चकुलाचलबृहद्भुजः (loloccakulācalabṛhadbhujaḥ) - (Mount Meru's arms) (whose great arms are the quivering, lofty principal mountains)

(adjective)

Nominative, masculine, singular of loloccakulācalabṛhadbhuja

loloccakulācalabṛhadbhuja - whose great arms are the quivering, lofty principal mountains

Compound type : bahuvrīhi (lola+ucca+kula+acala+bṛhat+bhuja)

• lola – quivering, trembling, moving, agitated
  adjective
• ucca – high, lofty, tall
  adjective
• kula – family, lineage, race; principal, chief (in compounds like kulācala)
  noun (neuter)
• acala – mountain, immovable
  noun (masculine)
  From a- (not) + cala (moving)
  Prefix: a
  Root: cal (class 1)
• bṛhat – great, large, vast, mighty
  adjective
• bhuja – arm
  noun (masculine)

Note: This adjective describes 'Meru'.

भ्रमदभ्रपटोपेतनमत्तूनूरुहः (bhramadabhrapaṭopetanamattūnūruhaḥ) - (Mount Meru's body-hairs/trees) (whose bending body-hairs (trees) are covered with a whirling cloud-garment)

(adjective)

Nominative, masculine, singular of bhramadabhrapaṭopetanamattūnūruha

bhramadabhrapaṭopetanamattūnūruha - having bending body-hairs (trees) covered with whirling cloud-garments

Compound type : bahuvrīhi (bhramat+abhrapaṭa+upeta+namat+tūnūruha)

• bhramat – whirling, rotating, wandering, moving
  adjective
  Present Active Participle
  From root bhram (class 1, to whirl, move about)
  Root: bhram (class 1)
• abhrapaṭa – cloud-garment, a piece of cloud
  noun (masculine)
• upeta – covered with, endowed with, possessed of
  adjective
  Past Passive Participle
  From root i (to go) with prefix upa-
  Prefix: upa
  Root: i (class 2)
• namat – bending, bowing, inclining
  adjective
  Present Active Participle
  From root nam (class 1, to bend, bow)
  Root: nam (class 1)
• tūnūruha – hair (possibly like sprouts or related to quivers); here poetically referring to trees as body-hairs
  noun (masculine)

Note: This adjective describes 'Meru'.