योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-25, verse-24

ततो दशगुणेनाथ पातालतलगामिना ।
निखातवलयेनोच्चैः श्वभ्रसंभाररूपिणा ॥ २४ ॥

tato daśaguṇenātha pātālatalagāminā ,
nikhātavalayenoccaiḥ śvabhrasaṃbhārarūpiṇā 24

24. tataḥ daśaguṇena atha pātālatalagamāminā
nikhātavalayena uccaiḥ śvabhra-saṃbhāra-rūpiṇā

24. atha tataḥ daśaguṇena,
pātālatalagamāminā,
uccaiḥ,
śvabhra-saṃbhāra-rūpiṇā nikhātavalayena

24. And then, from that (preceding layer), there is a trench (or ring) ten times the extent (of the previous), which descends to the bottom of the netherworlds (pātāla), profoundly deep, and appears as a vast collection of chasms.

Words meanings summery:

• ततः (tataḥ) - from that (referring to the previous layer/measure) (from that, thence, beyond that, after that)

• दशगुणेन (daśaguṇena) - by an extent ten times (the measure of the preceding layer) (by ten times, by that which is ten-fold)

• अथ (atha) - and, then, now

• पातालतलगमामिना (pātālatalagamāminā) - by that (trench) which reaches the deepest netherworlds (pātāla) (by that which goes to the bottom of pātāla)

• निखातवलयेन (nikhātavalayena) - by an excavated trench (valaya) in the cosmic structure (by a dug-out ring/trench, by an excavated enclosure)

• उच्चैः (uccaiḥ) - profoundly deep (referring to the trench) (high, loudly, deeply)

• श्वभ्र-संभार-रूपिणा (śvabhra-saṁbhāra-rūpiṇā) - by that (trench) which appears as a vast collection of abysses (by that which has the form of a mass of chasms)

Words meanings and morphology

ततः (tataḥ) - from that (referring to the previous layer/measure) (from that, thence, beyond that, after that)

(indeclinable)

दशगुणेन (daśaguṇena) - by an extent ten times (the measure of the preceding layer) (by ten times, by that which is ten-fold)

(adjective)

Instrumental, masculine, singular of daśaguṇa

daśaguṇa - tenfold, ten times

Compound adjective formed from daśa and guṇa

Compound type : bahuvrīhi/tatpuruṣa (daśa+guṇa)

• daśa – ten
  numeral
• guṇa – quality, attribute, multiple
  noun (masculine)

Note: Modifies an implicit noun or refers to a state of being ten-fold.

अथ (atha) - and, then, now

(indeclinable)

पातालतलगमामिना (pātālatalagamāminā) - by that (trench) which reaches the deepest netherworlds (pātāla) (by that which goes to the bottom of pātāla)

(adjective)

Instrumental, masculine, singular of pātālatalagamāmin

pātālatalagamāmin - going to the bottom of pātāla (netherworld)

agent noun/adjective (ṇini suffix)

Compound of pātālatala + gāmin. Gāmin is from root gam + ṇini.

Compound type : tatpuruṣa (pātāla+tala+gāmin)

• pātāla – netherworld, infernal regions
  noun (neuter)
• tala – bottom, surface, plane
  noun (neuter)
• gāmin – going, moving, leading to
  adjective (masculine)
  agent noun
  From root 'gam' (to go) with ṇini suffix.
  Root: gam (class 1)

Note: Modifies 'nikhātavalayena'.

निखातवलयेन (nikhātavalayena) - by an excavated trench (valaya) in the cosmic structure (by a dug-out ring/trench, by an excavated enclosure)

(noun)

Instrumental, masculine, singular of nikhātavalaya

nikhātavalaya - dug-out trench/ring

Compound of nikhāta (PPP) + valaya (noun)

Compound type : karmadhāraya (nikhāta+valaya)

• nikhāta – dug out, excavated
  adjective
  Past Passive Participle
  From upasarga 'ni' + root 'khan' (to dig)
  Prefix: ni
  Root: khan (class 1)
• valaya – ring, circle, enclosure, trench
  noun (masculine)

उच्चैः (uccaiḥ) - profoundly deep (referring to the trench) (high, loudly, deeply)

(indeclinable)

श्वभ्र-संभार-रूपिणा (śvabhra-saṁbhāra-rūpiṇā) - by that (trench) which appears as a vast collection of abysses (by that which has the form of a mass of chasms)

(adjective)

Instrumental, masculine, singular of śvabhra-saṃbhāra-rūpin

śvabhra-saṁbhāra-rūpin - having the form of a mass of chasms

Compound adjective ending in rūpin (having the form of)

Compound type : bahuvrīhi (śvabhra+saṃbhāra+rūpin)

• śvabhra – chasm, abyss, pit
  noun (neuter)
• saṃbhāra – collection, mass, accumulation
  noun (masculine)
• rūpin – having the form of, resembling
  adjective (masculine)
  Suffix -in from rūpa

Note: Modifies 'nikhātavalayena'.