योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-78, verse-18

शरीरसंनिवेशेन पङ्कपीठमिवोत्थिताम् ।
तनुं चन्द्रार्कयुद्धाय तमसेव समाश्रिताम् ॥ १८ ॥

śarīrasaṃniveśena paṅkapīṭhamivotthitām ,
tanuṃ candrārkayuddhāya tamaseva samāśritām 18

18. śarīrasaṃniveśena paṅkapīṭham iva utthitām
tanum candrārkayuddhāya tamasā iva samāśritām

18. śarīrasaṃniveśena paṅkapīṭham iva utthitām
tanum candrārkayuddhāya tamasā iva samāśritām

18. By the arrangement of her body (śarīrasaṃniveśa), she appeared as if risen from a muddy seat (paṅkapīṭha). Her form (tanu) was as though darkness (tamas) itself had taken refuge within her, preparing for a battle between the moon and the sun.

Words meanings summery:

• शरीरसंनिवेशेन (śarīrasaṁniveśena) - by the arrangement of the body, by the bodily form

• पङ्कपीठम् (paṅkapīṭham) - a muddy seat, a seat of mud

• इव (iva) - as if, like, as

• उत्थिताम् (utthitām) - risen, stood up, emerged

• तनुम् (tanum) - her form, body (body, form, slender)

• चन्द्रार्कयुद्धाय (candrārkayuddhāya) - for a battle between the moon and the sun

• तमसा (tamasā) - by darkness

• इव (iva) - as if, like, as

• समाश्रिताम् (samāśritām) - resorted to, taken refuge in, embraced, occupied

Words meanings and morphology

शरीरसंनिवेशेन (śarīrasaṁniveśena) - by the arrangement of the body, by the bodily form

(noun)

Instrumental, masculine, singular of śarīrasaṃniveśa

śarīrasaṁniveśa - bodily arrangement, disposition, composition

Compound type : tatpurusha (śarīra+saṃniveśa)

• śarīra – body
  noun (neuter)
• saṃniveśa – arrangement, disposition, construction
  noun (masculine)
  from root viś- (to enter) with prefixes sam- and ni-
  Prefixes: sam+ni
  Root: viś (class 6)

पङ्कपीठम् (paṅkapīṭham) - a muddy seat, a seat of mud

(noun)

Accusative, neuter, singular of paṅkapīṭha

paṅkapīṭha - a muddy seat, a seat made of mud

Compound type : tatpurusha (paṅka+pīṭha)

• paṅka – mud, mire, dirt
  noun (masculine)
• pīṭha – seat, stool
  noun (neuter)

इव (iva) - as if, like, as

(indeclinable)

उत्थिताम् (utthitām) - risen, stood up, emerged

(adjective)

Accusative, feminine, singular of utthitā

utthitā - risen, stood up, emerged (feminine)

Past Passive Participle

from root sthā- (to stand) with prefix ud-, feminine form

Prefix: ud

Root: sthā (class 1)

Note: Describes the feminine entity.

तनुम् (tanum) - her form, body (body, form, slender)

(noun)

Accusative, feminine, singular of tanu

tanu - body, form, slender, delicate

Note: Describes the feminine entity.

चन्द्रार्कयुद्धाय (candrārkayuddhāya) - for a battle between the moon and the sun

(noun)

Dative, neuter, singular of candrārkayuddha

candrārkayuddha - battle (yuddha) of the moon (candra) and sun (arka)

Compound type : tatpurusha (candra+arka+yuddha)

• candra – moon
  noun (masculine)
• arka – sun
  noun (masculine)
• yuddha – battle, fight
  noun (neuter)
  Root: yudh (class 4)

Note: Indicates purpose: 'for a battle'.

तमसा (tamasā) - by darkness

(noun)

Instrumental, neuter, singular of tamas

tamas - darkness, gloom

इव (iva) - as if, like, as

(indeclinable)

समाश्रिताम् (samāśritām) - resorted to, taken refuge in, embraced, occupied

(adjective)

Accusative, feminine, singular of samāśritā

samāśritā - resorted to, taken refuge in, embraced, occupied (feminine)

Past Passive Participle

from root śri- (to resort to, lean on) with prefixes sam- and ā-, feminine form

Prefixes: sam+ā

Root: śri (class 1)

Note: Describes the feminine entity.