योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-25, verse-16

ततोऽपि द्विगुणाकारं धारयन्त्या च वेष्टिताम् ।
प्रत्यग्रक्षीरपूर्णाब्धिलेखया स्वादुशीतया ॥ १६ ॥

tato'pi dviguṇākāraṃ dhārayantyā ca veṣṭitām ,
pratyagrakṣīrapūrṇābdhilekhayā svāduśītayā 16

16. tataḥ api dviguṇākāram dhārayantyā ca veṣṭitām
pratyagrakṣīrapūrṇābdhilekhayā svāduśītayā

16. tataḥ api veṣṭitām ca dviguṇākāram dhārayantyā
svāduśītayā pratyagrakṣīrapūrṇābdhilekhayā

16. Even greater than that, the previous (implied continent/ocean) being encircled, by the circular expanse of an ocean (abdhi) of fresh, sweet, and cool milk, which itself assumes a form twice its size.

Words meanings summery:

• ततः (tataḥ) - from that (the previous continent/entity) (from that, thence, even so)

• अपि (api) - even (emphasizing comparison to the previous entity) (also, even, too)

• द्विगुणाकारम् (dviguṇākāram) - a form twice the size (twice the size/form, having a double form)

• धारयन्त्या (dhārayantyā) - by that (the outline) which bears/assumes (by bearing, by holding, by maintaining)

• च (ca) - and (and, also, moreover)

• वेष्टिताम् (veṣṭitām) - the previous continent/entity being encircled (encircled, surrounded, enveloped, wrapped)

• प्रत्यग्रक्षीरपूर्णाब्धिलेखया (pratyagrakṣīrapūrṇābdhilekhayā) - by the circular expanse of an ocean filled with fresh milk (by the outline/region of an ocean full of fresh milk)

• स्वादुशीतया (svāduśītayā) - by that which is sweet and cool

Words meanings and morphology

ततः (tataḥ) - from that (the previous continent/entity) (from that, thence, even so)

(indeclinable)

अपि (api) - even (emphasizing comparison to the previous entity) (also, even, too)

(indeclinable)

द्विगुणाकारम् (dviguṇākāram) - a form twice the size (twice the size/form, having a double form)

(adjective)

Accusative, masculine, singular of dviguṇākāra

dviguṇākāra - twice the size/form, having a double form

Compound type : tatpuruṣa (dviguṇa+ākāra)

• dviguṇa – twice, double
  adjective (masculine)
• ākāra – form, shape, size, appearance
  noun (masculine)

Note: Object of 'dhārayantyā', referring to the form the ocean's outline assumes.

धारयन्त्या (dhārayantyā) - by that (the outline) which bears/assumes (by bearing, by holding, by maintaining)

(verbal derivative)

च (ca) - and (and, also, moreover)

(indeclinable)

वेष्टिताम् (veṣṭitām) - the previous continent/entity being encircled (encircled, surrounded, enveloped, wrapped)

(adjective)

Accusative, feminine, singular of veṣṭita

veṣṭita - encircled, surrounded, enveloped, wrapped

past passive participle

Derived from root √veṣṭ (to encircle, wrap).

Root: veṣṭ

Note: Modifies an implied previous feminine entity (e.g., 'pūrvām dvīpam' or 'bhūmim').

प्रत्यग्रक्षीरपूर्णाब्धिलेखया (pratyagrakṣīrapūrṇābdhilekhayā) - by the circular expanse of an ocean filled with fresh milk (by the outline/region of an ocean full of fresh milk)

(noun)

Instrumental, feminine, singular of pratyagrakṣīrapūrṇābdhilekhā

pratyagrakṣīrapūrṇābdhilekhā - outline/region of an ocean full of fresh milk

Compound noun.

Compound type : tatpuruṣa (pratyagra+kṣīra+pūrṇa+abdhi+lekhā)

• pratyagra – fresh, new, recent
  adjective (masculine)
• kṣīra – milk, milky juice
  noun (neuter)
• pūrṇa – full, complete, filled
  adjective (masculine)
  past passive participle
  From root √pṛ (to fill).
  Root: pṛ
• abdhi – ocean, sea (literally 'holder of water')
  noun (masculine)
• lekhā – line, outline, boundary, region, tract
  noun (feminine)

Note: The primary instrumental agent/means in the sentence.

स्वादुशीतया (svāduśītayā) - by that which is sweet and cool

(adjective)

Instrumental, feminine, singular of svāduśītā

svāduśītā - sweet and cool

Compound adjective.

Compound type : karmadhāraya (svādu+śīta)

• svādu – sweet, palatable, agreeable
  adjective (neuter)
• śīta – cool, cold
  adjective (masculine)

Note: Adjective modifying 'pratyagrakṣīrapūrṇābdhilekhayā'.