योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-38, verse-17

क्रमेणासीन्मुहूर्तेन विकटोदरभीषणम् ।
अगस्त्यपीतार्णववच्छून्यमेव रणाङ्गणम् ॥ १७ ॥

krameṇāsīnmuhūrtena vikaṭodarabhīṣaṇam ,
agastyapītārṇavavacchūnyameva raṇāṅgaṇam 17

17. krameṇa āsīt muhūrtena vikaṭodarabhīṣaṇam
agastyapītārṇavavat śūnyam eva raṇāṅgaṇam

17. krameṇa muhūrtena raṇāṅgaṇam vikaṭodarabhīṣaṇam
agastyapītārṇavavat śūnyam eva āsīt

17. Following this, and in a short time, the battlefield became frightfully vast and empty, resembling the ocean swallowed by Agastya.

Words meanings summery:

• क्रमेण (krameṇa) - in due course, following previous events (gradually, successively, in due course)

• आसीत् (āsīt) - became (was, existed, became)

• मुहूर्तेन (muhūrtena) - in a short time, swiftly (in a moment, quickly, in a short time)

• विकटोदरभीषणम् (vikaṭodarabhīṣaṇam) - dreadfully vast and empty (describing the battlefield) (having a frightfully vast emptiness, dreadful with a vast interior)

• अगस्त्यपीतार्णववत् (agastyapītārṇavavat) - resembling the ocean after being swallowed by the sage Agastya (a mythological reference for complete emptiness) (like the ocean drunk/swallowed by Agastya)

• शून्यम् (śūnyam) - utterly empty (empty, void, deserted)

• एव (eva) - utterly, indeed (just, only, indeed, alone)

• रणाङ्गणम् (raṇāṅgaṇam) - the battlefield (battlefield)

Words meanings and morphology

क्रमेण (krameṇa) - in due course, following previous events (gradually, successively, in due course)

(noun)

Instrumental, masculine, singular of krama

krama - step, order, succession, course

Root: kram (class 1)

Note: Used adverbially.

आसीत् (āsīt) - became (was, existed, became)

(verb)

3rd person , singular, active, imperfect (laṅ) of as

Imperfect Active

Root: as (class 2)

मुहूर्तेन (muhūrtena) - in a short time, swiftly (in a moment, quickly, in a short time)

(noun)

Instrumental, masculine, singular of muhūrta

muhūrta - a moment, a short time, an instant (a unit of time)

Note: Used adverbially.

विकटोदरभीषणम् (vikaṭodarabhīṣaṇam) - dreadfully vast and empty (describing the battlefield) (having a frightfully vast emptiness, dreadful with a vast interior)

(adjective)

Nominative, neuter, singular of vikaṭodarabhīṣaṇa

vikaṭodarabhīṣaṇa - frightful with a vast interior, dreadfully cavernous

Compound type : bahuvrīhi (vikaṭa+udara+bhīṣaṇa)

• vikaṭa – vast, immense, terrible, dreadful
  adjective (masculine)
• udara – belly, interior, cavity, hollow
  noun (neuter)
• bhīṣaṇa – frightful, terrible, dreadful
  adjective (masculine)
  From root bhī (to fear).
  Root: bhī (class 3)

Note: Adjective modifying raṇāṅgaṇam.

अगस्त्यपीतार्णववत् (agastyapītārṇavavat) - resembling the ocean after being swallowed by the sage Agastya (a mythological reference for complete emptiness) (like the ocean drunk/swallowed by Agastya)

(adjective)

Nominative, neuter, singular of agastyapītārṇavavat

agastyapītārṇavavat - like the ocean swallowed by Agastya

Compound type : tatpuruṣa (agastya+pīta+arṇava+vat)

• agastya – the sage Agastya (who, in mythology, drank the ocean)
  proper noun (masculine)
• pīta – drunk, swallowed
  participle (masculine)
  Past Passive Participle
  From root pā (to drink).
  Root: pā (class 1)
• arṇava – ocean, sea
  noun (masculine)
• vat – like, as, resembling
  indeclinable

Note: Adjective modifying raṇāṅgaṇam.

शून्यम् (śūnyam) - utterly empty (empty, void, deserted)

(adjective)

Nominative, neuter, singular of śūnya

śūnya - empty, void, deserted, naught

Root: śū

Note: Adjective modifying raṇāṅgaṇam.

एव (eva) - utterly, indeed (just, only, indeed, alone)

(indeclinable)

रणाङ्गणम् (raṇāṅgaṇam) - the battlefield (battlefield)

(noun)

Nominative, neuter, singular of raṇāṅgaṇa

raṇāṅgaṇa - battlefield, arena of war

Compound type : tatpuruṣa (raṇa+aṅgaṇa)

• raṇa – battle, war, combat
  noun (masculine)
  Root: raṇ (class 1)
• aṅgaṇa – courtyard, open space, arena
  noun (neuter)

Note: Subject of the sentence.