योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-18, verse-36

सरःस्रोतोब्धिसरसीजलोक्षितमहीतलः ।
पातालभूतलस्वर्गभागभासुरकोटरः ॥ ३६ ॥

saraḥsrotobdhisarasījalokṣitamahītalaḥ ,
pātālabhūtalasvargabhāgabhāsurakoṭaraḥ 36

36. saraḥsrotobdhisarasījalokṣitamahītalaḥ
pātālabhūtalasvargabhāgabhāsurakoṭaraḥ

36. saraḥsrotobdhisarasījalokṣitamahītalaḥ
pātālabhūtalasvargabhāgabhāsurakoṭaraḥ

36. Its earthly surface is moistened by the waters of lakes, streams, oceans, and ponds, and it possesses radiant cavities in the regions of the netherworld, the earth, and heaven.

Words meanings summery:

• सरःस्रोतोब्धिसरसीजलोक्षितमहीतलः (saraḥsrotobdhisarasījalokṣitamahītalaḥ) - describing the entity as having a vast earthly expanse that is nourished by various water bodies (having its earth's surface moistened by the waters of lakes, streams, oceans, and ponds)

• पातालभूतलस्वर्गभागभासुरकोटरः (pātālabhūtalasvargabhāgabhāsurakoṭaraḥ) - describing the entity as encompassing all three worlds and possessing radiant internal spaces within them (having shining cavities in its parts comprising the netherworld, earth, and heaven)

Words meanings and morphology

सरःस्रोतोब्धिसरसीजलोक्षितमहीतलः (saraḥsrotobdhisarasījalokṣitamahītalaḥ) - describing the entity as having a vast earthly expanse that is nourished by various water bodies (having its earth's surface moistened by the waters of lakes, streams, oceans, and ponds)

(adjective)

Nominative, masculine, singular of saraḥsrotobdhisarasījalokṣitamahītala

saraḥsrotobdhisarasījalokṣitamahītala - having its earthly surface moistened by the waters of lakes, streams, oceans, and ponds

Compound type : bahuvrīhi (saraḥ+srotas+abdhi+sarasī+jala+ukṣita+mahītala)

• saraḥ – lake, pond
  noun (neuter)
• srotas – stream, current, river
  noun (neuter)
• abdhi – ocean, sea
  noun (masculine)
• sarasī – large pond, lake
  noun (feminine)
• jala – water
  noun (neuter)
• ukṣita – sprinkled, moistened, bedewed
  adjective
  Past Passive Participle
  From root ukṣ (to sprinkle, moisten)
  Root: ukṣ (class 6)
• mahī – earth, ground
  noun (feminine)
• tala – surface, plane, base
  noun (neuter)

Note: Refers to the subject of description, implied masculine singular.

पातालभूतलस्वर्गभागभासुरकोटरः (pātālabhūtalasvargabhāgabhāsurakoṭaraḥ) - describing the entity as encompassing all three worlds and possessing radiant internal spaces within them (having shining cavities in its parts comprising the netherworld, earth, and heaven)

(adjective)

Nominative, masculine, singular of pātālabhūtalasvargabhāgabhāsurakoṭara

pātālabhūtalasvargabhāgabhāsurakoṭara - having shining cavities in its parts comprising the netherworld, earth, and heaven

Compound type : bahuvrīhi (pātāla+bhūtala+svarga+bhāga+bhāsura+koṭara)

• pātāla – netherworld, infernal regions
  noun (neuter)
• bhūtala – earth's surface, terrestrial plane
  noun (neuter)
• svarga – heaven, paradise
  noun (masculine)
• bhāga – part, portion, division
  noun (masculine)
• bhāsura – shining, splendid, brilliant
  adjective
  From root bhās (to shine)
  Root: bhās (class 1)
• koṭara – cavity, hollow, cavern, tree-hollow
  noun (masculine)

Note: Refers to the subject of description, implied masculine singular.