योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-77, verse-15

अङ्गारकोटरघना सौषुप्तपदसुन्दरी ।
अज्ञाननिद्रानिबिडा भृङ्गपृष्ठच्छदच्छविः ॥ १५ ॥

aṅgārakoṭaraghanā sauṣuptapadasundarī ,
ajñānanidrānibiḍā bhṛṅgapṛṣṭhacchadacchaviḥ 15

15. aṅgārakoṭaraghanā sauṣuptapadasundarī
ajñānanidrānibiḍā bhṛṅgapṛṣṭhacchadacchaviḥ

15. aṅgārakoṭaraghanā,
sauṣuptapadasundarī,
ajñānanidrānibiḍā,
bhṛṅgapṛṣṭhacchadacchaviḥ

15. She is as dense as the cavity of a burning coal, beautiful in the state of deep sleep (sauṣupta). She is profoundly solidified by the sleep of ignorance (ajñāna), and her splendor is like the dark surface of a bee's back.

Words meanings summery:

• अङ्गारकोटरघना (aṅgārakoṭaraghanā) - dense like the cavity of a burning coal (describing the profound, dark density of Mahāmāyā) (dense like the hollow/cavity of a charcoal)

• सौषुप्तपदसुन्दरी (sauṣuptapadasundarī) - beautiful in the state of deep sleep (sauṣupta), referring to the goddess Mahāmāyā as Yoganidrā (beautiful in the state of deep sleep)

• अज्ञाननिद्रानिबिडा (ajñānanidrānibiḍā) - profoundly solidified by the sleep of ignorance (ajñāna), describing the pervasive nature of Mahāmāyā as the source of ignorance (intensely dense/compact with the sleep of ignorance)

• भृङ्गपृष्ठच्छदच्छविः (bhṛṅgapṛṣṭhacchadacchaviḥ) - having the splendor like the dark, glossy surface of a bee's back (describing Mahāmāyā's dark, shining complexion) (having the luster/splendor of the back-covering of a bee)

Words meanings and morphology

अङ्गारकोटरघना (aṅgārakoṭaraghanā) - dense like the cavity of a burning coal (describing the profound, dark density of Mahāmāyā) (dense like the hollow/cavity of a charcoal)

(adjective)

Nominative, feminine, singular of aṅgārakoṭaraghanā

aṅgārakoṭaraghana - dense like the hollow/cavity of a charcoal

Compound type : Bahuvrihi (aṅgāra+koṭara+ghana)

• aṅgāra – charcoal, live coal, ember
  noun (masculine)
• koṭara – hollow, cavity, socket, cavern
  noun (neuter)
• ghana – dense, thick, compact, solid
  adjective

सौषुप्तपदसुन्दरी (sauṣuptapadasundarī) - beautiful in the state of deep sleep (sauṣupta), referring to the goddess Mahāmāyā as Yoganidrā (beautiful in the state of deep sleep)

(adjective)

Nominative, feminine, singular of sauṣuptapadasundarī

sauṣuptapadasundara - beautiful in the state of deep sleep

Compound type : Bahuvrihi (sauṣupta+pada+sundara)

• sauṣupta – pertaining to deep sleep, deep sleep (sauṣupta)
  adjective (neuter)
  Derived from suṣupti (deep sleep)
• pada – state, condition, foot, place
  noun (neuter)
• sundara – beautiful, handsome, lovely
  adjective

अज्ञाननिद्रानिबिडा (ajñānanidrānibiḍā) - profoundly solidified by the sleep of ignorance (ajñāna), describing the pervasive nature of Mahāmāyā as the source of ignorance (intensely dense/compact with the sleep of ignorance)

(adjective)

Nominative, feminine, singular of ajñānanidrānibiḍā

ajñānanidrānibiḍa - intensely dense/compact with the sleep of ignorance

Compound type : Bahuvrihi (ajñāna+nidrā+nibiḍa)

• ajñāna – ignorance, nescience, spiritual ignorance (ajñāna)
  noun (neuter)
  Prefix: a
  Root: jñā (class 9)
• nidrā – sleep
  noun (feminine)
• nibiḍa – dense, compact, thick, intense
  adjective

भृङ्गपृष्ठच्छदच्छविः (bhṛṅgapṛṣṭhacchadacchaviḥ) - having the splendor like the dark, glossy surface of a bee's back (describing Mahāmāyā's dark, shining complexion) (having the luster/splendor of the back-covering of a bee)

(adjective)

Nominative, feminine, singular of bhṛṅgapṛṣṭhacchadacchavi

bhṛṅgapṛṣṭhacchadacchavi - having the luster/splendor of the back-covering of a bee

Compound type : Bahuvrihi (bhṛṅga+pṛṣṭha+cchada+chavi)

• bhṛṅga – bee, large black bee
  noun (masculine)
• pṛṣṭha – back, surface, top
  noun (neuter)
• cchada – covering, sheath, wing, feather, leaf
  noun (masculine)
  Root: chad (class 10)
• chavi – luster, splendor, beauty, color, complexion
  noun (feminine)