योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-25, verse-17

ततोऽपि द्विगुणाकारं धारयन्त्योपवेष्टिताम् ।
नानाजनालंकृतया कुशाख्यद्वीपलेखया ॥ १७ ॥

tato'pi dviguṇākāraṃ dhārayantyopaveṣṭitām ,
nānājanālaṃkṛtayā kuśākhyadvīpalekhayā 17

17. tataḥ api dviguṇākāram dhārayantyā upaveṣṭitām
nānājanālaṅkṛtayā kuśākhyadvīpalekhayā

17. tataḥ api upaveṣṭitām dviguṇākāram dhārayantyā
nānājanālaṅkṛtayā kuśākhyadvīpalekhayā

17. Even greater than that, the previous (implied ocean) being surrounded, by the circular expanse of the continent (dvīpa) named Kuśa, which is adorned by various peoples, and itself assumes a form twice its size.

Words meanings summery:

• ततः (tataḥ) - from that (the previous ocean/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)

• उपवेष्टिताम् (upaveṣṭitām) - the previous ocean/entity being closely surrounded (closely surrounded, closely encircled)

• नानाजनालङ्कृतया (nānājanālaṅkṛtayā) - by that (the outline) which is adorned by various peoples (by that which is adorned by various peoples)

• कुशाख्यद्वीपलेखया (kuśākhyadvīpalekhayā) - by the circular expanse of the continent named Kuśa (by the outline/region of the continent named Kuśa)

Words meanings and morphology

ततः (tataḥ) - from that (the previous ocean/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 continent's outline assumes.

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

(verbal derivative)

उपवेष्टिताम् (upaveṣṭitām) - the previous ocean/entity being closely surrounded (closely surrounded, closely encircled)

(adjective)

Accusative, feminine, singular of upaveṣṭita

upaveṣṭita - closely surrounded, closely encircled

past passive participle

Derived from root √veṣṭ (to encircle) with prefix upa-.

Prefix: upa

Root: veṣṭ

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

नानाजनालङ्कृतया (nānājanālaṅkṛtayā) - by that (the outline) which is adorned by various peoples (by that which is adorned by various peoples)

(adjective)

Instrumental, feminine, singular of nānājanālaṅkṛtā

nānājanālaṅkṛtā - adorned by various people

past passive participle used as adjective

Compound adjective formed from nānā + jana + alaṅkṛta.

Compound type : tatpuruṣa (nānā+jana+alaṅkṛta)

• nānā – various, diverse, manifold
  indeclinable
• jana – person, people, creature
  noun (masculine)
• alaṅkṛta – adorned, decorated, ornamented
  verbal derivative (masculine)
  past passive participle
  From root √kṛ (to do, make) with prefix alam-.
  Prefix: alam
  Root: kṛ

Note: Adjective modifying 'kuśākhyadvīpalekhayā'.

कुशाख्यद्वीपलेखया (kuśākhyadvīpalekhayā) - by the circular expanse of the continent named Kuśa (by the outline/region of the continent named Kuśa)

(noun)

Instrumental, feminine, singular of kuśākhyadvīpalekhā

kuśākhyadvīpalekhā - outline/region of the continent named Kuśa

Compound noun.

Compound type : tatpuruṣa (kuśa+ākhya+dvīpa+lekhā)

• kuśa – Kuśa (a sacred grass, or the name of a continent)
  proper noun (masculine)
• ākhya – named, called
  adjective (masculine)
  past passive participle
  From root ā-khyā (to name, tell).
  Prefix: ā
  Root: khyā
• dvīpa – island, continent, region
  noun (masculine)
• lekhā – line, outline, boundary, region, tract
  noun (feminine)

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