योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-78, verse-23

नदीधाराधरैरूर्ध्वे मध्ये दग्धैर्धराधरैः ।
अधो धराधरैर्नागैरधरः पङ्कगैर्वृतः ॥ २३ ॥

nadīdhārādharairūrdhve madhye dagdhairdharādharaiḥ ,
adho dharādharairnāgairadharaḥ paṅkagairvṛtaḥ 23

23. nadīdhārādharaiḥ ūrdhve madhye dagdhaiḥ dharādharaiḥ
adho dharādharaiḥ nāgaiḥ adharaḥ paṅkagaiḥ vṛtaḥ

23. (implied subject) ūrdhve
nadīdhārādharaiḥ madhye dagdhaiḥ
dharādharaiḥ adho dharādharaiḥ
nāgaiḥ ca adharaḥ paṅkagaiḥ vṛtaḥ

23. Above, it is (associated) with those that bear river currents (clouds). In the middle, it is (associated) with scorched mountains. Below, it is (associated) with mountains and nāgas (serpent-beings), and its lower part is surrounded by creatures moving in mud.

Words meanings summery:

• नदीधाराधरैः (nadīdhārādharaiḥ) - refers to the clouds that carry and release river-like currents of rain in the upper regions. (by those bearing river currents; by clouds.)

• ऊर्ध्वे (ūrdhve) - indicates the uppermost region relative to the body of water. (above, upwards, in the upper part.)

• मध्ये (madhye) - indicates the mid-level region of the water body. (in the middle, amidst.)

• दग्धैः (dagdhaiḥ) - by mountains that appear burned or scorched, possibly volcanic or submerged structures affected by intense heat. (by those burned, scorched.)

• धराधरैः (dharādharaiḥ) - refers to mountains, possibly submerged peaks within the ocean or river. (by mountains, by earth-bearers.)

• अधो (adho) - indicates the lowest region of the water body. (below, downwards, underneath.)

• धराधरैः (dharādharaiḥ) - refers to mountains, potentially even deeper or more foundational peaks within the ocean. (by mountains, by earth-bearers.)

• नागैः (nāgaiḥ) - refers to the mythical serpent-beings (nāgas) that inhabit the netherworlds or depths of water bodies. (by elephants; by serpents; by Nāga beings.)

• अधरः (adharaḥ) - specifically refers to the very bottom or lowest extremity of the water body being described. (the lower part; lower, inferior.)

• पङ्कगैः (paṅkagaiḥ) - by creatures that inhabit and move through the muddy depths of the ocean or river bed. (by those moving in mud; by aquatic creatures; by fish.)

• वृतः (vṛtaḥ) - surrounded, covered, enveloped.

Words meanings and morphology

नदीधाराधरैः (nadīdhārādharaiḥ) - refers to the clouds that carry and release river-like currents of rain in the upper regions. (by those bearing river currents; by clouds.)

(noun)

Instrumental, masculine, plural of nadīdhārādhara

nadīdhārādhara - cloud (literally 'river-current-bearer').

Compound type : tatpuruṣa (nadī+dhārā+dhara)

• nadī – river
  noun (feminine)
• dhārā – stream, current, flow
  noun (feminine)
• dhara – bearer, holding, supporting
  noun/adjective (masculine)
  agent noun/adjective
  Derived from root `dhṛ` (धारणपोषणयोः - to hold, bear).
  Root: dhṛ (class 1)

ऊर्ध्वे (ūrdhve) - indicates the uppermost region relative to the body of water. (above, upwards, in the upper part.)

(indeclinable)

Locative singular form of `ūrdhva` used adverbially.

Note: Adverbial usage of locative singular.

मध्ये (madhye) - indicates the mid-level region of the water body. (in the middle, amidst.)

(indeclinable)

Locative singular form of `madhya` used adverbially.

Note: Adverbial usage of locative singular.

दग्धैः (dagdhaiḥ) - by mountains that appear burned or scorched, possibly volcanic or submerged structures affected by intense heat. (by those burned, scorched.)

(participle)

Instrumental, masculine, plural of dagdha

dagdha - burned, scorched, consumed by fire.

past passive participle

Derived from the root `dah` (भस्मीकरणे - to burn, scorch), class 1P.

Root: dah (class 1)

धराधरैः (dharādharaiḥ) - refers to mountains, possibly submerged peaks within the ocean or river. (by mountains, by earth-bearers.)

(noun)

Instrumental, masculine, plural of dharādhara

dharādhara - mountain (literally 'earth-bearer'); cloud.

Compound type : tatpuruṣa (dharā+dhara)

• dharā – earth, ground
  noun (feminine)
• dhara – bearer, holding, supporting
  noun/adjective (masculine)
  agent noun/adjective
  Derived from root `dhṛ` (धारणपोषणयोः - to hold, bear).
  Root: dhṛ (class 1)

अधो (adho) - indicates the lowest region of the water body. (below, downwards, underneath.)

(indeclinable)

Derived from `adhas` (below), where `s` becomes `o` in sandhi before a soft consonant or vowel.

धराधरैः (dharādharaiḥ) - refers to mountains, potentially even deeper or more foundational peaks within the ocean. (by mountains, by earth-bearers.)

(noun)

Instrumental, masculine, plural of dharādhara

dharādhara - mountain (literally 'earth-bearer'); cloud.

Compound type : tatpuruṣa (dharā+dhara)

• dharā – earth, ground
  noun (feminine)
• dhara – bearer, holding, supporting
  noun/adjective (masculine)
  agent noun/adjective
  Derived from root `dhṛ` (धारणपोषणयोः - to hold, bear).
  Root: dhṛ (class 1)

नागैः (nāgaiḥ) - refers to the mythical serpent-beings (nāgas) that inhabit the netherworlds or depths of water bodies. (by elephants; by serpents; by Nāga beings.)

(noun)

Instrumental, masculine, plural of nāga

nāga - serpent, snake, Nāga (mythical serpent-being); elephant; mountain.

अधरः (adharaḥ) - specifically refers to the very bottom or lowest extremity of the water body being described. (the lower part; lower, inferior.)

(noun)

Nominative, masculine, singular of adhara

adhara - lower, inferior, lowest; lower lip; bottom.

पङ्कगैः (paṅkagaiḥ) - by creatures that inhabit and move through the muddy depths of the ocean or river bed. (by those moving in mud; by aquatic creatures; by fish.)

(noun)

Instrumental, masculine, plural of paṅkaga

paṅkaga - moving in mud, dwelling in mud; marsh-animal, aquatic creature.

Derived from `paṅka` (mud) and `ga` (from root `gam` - to go).

Compound type : upapada tatpuruṣa (paṅka+ga)

• paṅka – mud, mire, dirt, sin
  noun (masculine)
• ga – going, moving, dwelling in
  adjective/suffix (masculine)
  agent suffix
  Derived from root `gam` (गतौ - to go).
  Root: gam (class 1)

वृतः (vṛtaḥ) - surrounded, covered, enveloped.

(participle)

Nominative, masculine, singular of vṛta

vṛta - surrounded, covered, chosen, appointed.

past passive participle

Derived from the root `vṛ` (संवृतौ - to cover, surround), class 5U.

Root: vṛ (class 5)