योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-50, verse-21

ज्वालयामास स रथं सिन्धोः कक्षमिवारसम् ।
एतस्मिन्नन्तरे व्योम्नि हेतिनिर्विवरोदरे ॥ २१ ॥

jvālayāmāsa sa rathaṃ sindhoḥ kakṣamivārasam ,
etasminnantare vyomni hetinirvivarodare 21

21. jvālayāmāsa saḥ ratham sindhoḥ kakṣam iva
arasam etasmin antare vyomni hetinirvivarodare

21. saḥ sindhoḥ ratham arasam kakṣam iva jvālayāmāsa.
etasmin antare hetinirvivarodare vyomni

21. He (Vidūratha) set ablaze Sindhu's chariot as if it were a dry forest. Meanwhile, in the sky, its expanse became entirely filled with weapons, leaving no empty space.

Words meanings summery:

• ज्वालयामास (jvālayāmāsa) - he ignited, he set ablaze

• सः (saḥ) - he, that one

• रथम् (ratham) - chariot

• सिन्धोः (sindhoḥ) - of the warrior Sindhu (of Sindhu)

• कक्षम् (kakṣam) - dry grass, dry forest, thicket

• इव (iva) - like, as if, as

• अरसम् (arasam) - dry, sapless, tasteless, dull

• एतस्मिन् (etasmin) - in this, in this very

• अन्तरे (antare) - in the interval, meanwhile, in the middle

• व्योम्नि (vyomni) - in the sky, in space

• हेतिनिर्विवरोदरे (hetinirvivarodare) - in the interior/expanse made free of empty space by weapons

Words meanings and morphology

ज्वालयामास (jvālayāmāsa) - he ignited, he set ablaze

(verb)

3rd person , singular, active, perfect (liṭ) of jval

Causative Perfect

from √jval (causative form jvalaya), perfect tense (āmāsa suffix)

Root: √jval (class 1)

Note: The action of setting fire to Sindhu's chariot.

सः (saḥ) - he, that one

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

Note: Refers to Vidūratha.

रथम् (ratham) - chariot

(noun)

Accusative, masculine, singular of ratha

ratha - chariot, car, vehicle

Root: √raṁh (class 1)

Note: The object set ablaze.

सिन्धोः (sindhoḥ) - of the warrior Sindhu (of Sindhu)

(noun)

Genitive, masculine, singular of sindhu

sindhu - river, ocean, Indus (river), a specific person's name (Sindhu)

Note: Indicates possession, referring to Sindhu's chariot.

कक्षम् (kakṣam) - dry grass, dry forest, thicket

(noun)

Accusative, masculine, singular of kakṣa

kakṣa - dry grass, dry forest, thicket, armpit, side

Note: Used in a simile, referring to something easily combustible.

इव (iva) - like, as if, as

(indeclinable)

Note: Marks a comparison.

अरसम् (arasam) - dry, sapless, tasteless, dull

(adjective)

Accusative, neuter, singular of arasa

arasa - dry, sapless, tasteless, dull, without essence

from a-rasa (without juice/essence)

Note: Agrees with 'kakṣam'.

एतस्मिन् (etasmin) - in this, in this very

(pronoun)

Locative, masculine, singular of etad

etad - this, this very

Note: Points to the specific interval of time.

अन्तरे (antare) - in the interval, meanwhile, in the middle

(noun)

Locative, neuter, singular of antara

antara - interval, middle, space, difference, meanwhile

Note: Indicates a temporal setting for the following event.

व्योम्नि (vyomni) - in the sky, in space

(noun)

Locative, neuter, singular of vyoman

vyoman - sky, atmosphere, space

Root: √yu (class 2)

Note: Location where the weapons fill the space.

हेतिनिर्विवरोदरे (hetinirvivarodare) - in the interior/expanse made free of empty space by weapons

(adjective)

Locative, neuter, singular of hetinirvivarodara

hetinirvivarodara - having an interior/expanse filled without gap by weapons

Compound type : bahuvrihi (heti+nirvivara+udara)

• heti – weapon, missile, flame
  noun (feminine)
  Root: √hi (class 3)
• nirvivara – without opening, without gap, full, crowded
  adjective (neuter)
  from nis-vivara (without opening)
  Prefix: nis
  Root: √vṛ (class 5)
• udara – belly, interior, expanse, cavity, space
  noun (neuter)

Note: Describes the state of the sky (vyomni) due to the presence of many weapons.