योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-108, verse-39

नतोन्नतानि कुर्वन्तः स्पन्देनोर्वीनतोन्नतैः ।
हेषन्ते हयसंघाता वातस्पन्दमहाब्धिवत् ॥ ३९ ॥

natonnatāni kurvantaḥ spandenorvīnatonnataiḥ ,
heṣante hayasaṃghātā vātaspandamahābdhivat 39

39. nata-unnatāni kurvantaḥ spandena urvīm nata-unnataiḥ
heṣante haya-saṃghātā vāta-spanda-mahābdhivāt

39. haya-saṃghātā spandena urvīm nata-unnatāni
nata-unnataiḥ kurvantaḥ vāta-spanda-mahābdhivāt heṣante

39. Making the earth uneven with their movements, the throngs of horses neigh, like the great ocean agitated by wind.

Words meanings summery:

• नत-उन्नतानि (nata-unnatāni) - uneven (ground) (low and high, uneven)

• कुर्वन्तः (kurvantaḥ) - causing (the earth to be uneven) (making, doing, causing)

• स्पन्देन (spandena) - by their movement (of the horses) (by shaking, by trembling, by movement)

• उर्वीम् (urvīm) - the earth (the earth, ground)

• नत-उन्नतैः (nata-unnataiḥ) - by their rising and falling (movements), by the unevenness (they create) (by the low and high, by the uneven)

• हेषन्ते (heṣante) - they neigh (referring to horses) (they neigh, they whinny)

• हय-संघाता (haya-saṁghātā) - throngs of horses (throngs of horses, multitudes of horses)

• वात-स्पन्द-महाब्धिवात् (vāta-spanda-mahābdhivāt) - like the great ocean agitated by wind (like a great ocean agitated by wind)

Words meanings and morphology

नत-उन्नतानि (nata-unnatāni) - uneven (ground) (low and high, uneven)

(adjective)

Accusative, neuter, plural of nata-unnata

nata-unnata - low and high, depressed and elevated, uneven

Compound.

Compound type : Dvandva (nata+unnata)

• nata – bowed, bent, depressed, low
  participle (neuter)
  Past Passive Participle
  From root nam (to bend, bow).
  Root: nam (class 1)
• unnata – raised, high, elevated
  participle (neuter)
  Past Passive Participle
  From root nam (to bend, bow) with prefix ud- (up).
  Prefix: ud
  Root: nam (class 1)

Note: Qualifies `urvīm` (earth), implying 'making the earth uneven'.

कुर्वन्तः (kurvantaḥ) - causing (the earth to be uneven) (making, doing, causing)

(participle)

Nominative, masculine, plural of kurvant

kurvant - making, doing (present active participle)

Present Active Participle

From root kṛ (to do, make).

Root: kṛ (class 8)

स्पन्देन (spandena) - by their movement (of the horses) (by shaking, by trembling, by movement)

(noun)

Instrumental, masculine, singular of spanda

spanda - trembling, throbbing, movement, agitation

From root spand (to tremble).

Root: spand (class 1)

उर्वीम् (urvīm) - the earth (the earth, ground)

(noun)

Accusative, feminine, singular of urvī

urvī - earth, ground, wide, extensive

From uru (wide).

नत-उन्नतैः (nata-unnataiḥ) - by their rising and falling (movements), by the unevenness (they create) (by the low and high, by the uneven)

(adjective)

Instrumental, masculine, plural of nata-unnata

nata-unnata - low and high, depressed and elevated, uneven

Compound.

Compound type : Dvandva (nata+unnata)

• nata – bowed, bent, depressed, low
  participle (masculine)
  Past Passive Participle
  From root nam (to bend, bow).
  Root: nam (class 1)
• unnata – raised, high, elevated
  participle (masculine)
  Past Passive Participle
  From root nam (to bend, bow) with prefix ud- (up).
  Prefix: ud
  Root: nam (class 1)

Note: Agrees with implied movements or with the agents (horses) themselves, describing how they make the earth uneven.

हेषन्ते (heṣante) - they neigh (referring to horses) (they neigh, they whinny)

(verb)

3rd person , plural, middle, present (laṭ) of heṣ

Root: heṣ (class 1)

हय-संघाता (haya-saṁghātā) - throngs of horses (throngs of horses, multitudes of horses)

(noun)

Nominative, masculine, plural of haya-saṃghāta

haya-saṁghāta - multitude of horses, horse-throng

Compound.

Compound type : Tatpuruṣa (haya+saṃghāta)

• haya – horse
  noun (masculine)
  Root: hi
• saṃghāta – throng, multitude, aggregation, heap
  noun (masculine)
  From root han (to strike, collect) with prefix sam- (together).
  Prefix: sam
  Root: han (class 2)

वात-स्पन्द-महाब्धिवात् (vāta-spanda-mahābdhivāt) - like the great ocean agitated by wind (like a great ocean agitated by wind)

(indeclinable)

Compound with -vat suffix.

Compound type : Bahuvrīhi (vāta+spanda+mahābdhi)

• vāta – wind, air
  noun (masculine)
  Root: vā (class 2)
• spanda – trembling, throbbing, movement, agitation
  noun (masculine)
  From root spand (to tremble).
  Root: spand (class 1)
• mahābdhi – great ocean
  noun (masculine)
  Compound.
• mahā – great, large, mighty
  adjective (feminine)
  Feminine form of mahat.
• abdhi – ocean, sea (lit. 'water-receptacle')
  noun (masculine)
  Compound: ap (water) + dhā (to hold).
  Root: dhā (class 3)

Note: Suffix -vat (like, similar to).