योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-37, verse-12

परमाकाशनगरनाट्यमण्डपभूमिषु ।
स्वशक्तिवृत्तं संसारं पश्यन्ती साक्षिवत्स्थिता ॥ १२ ॥

paramākāśanagaranāṭyamaṇḍapabhūmiṣu ,
svaśaktivṛttaṃ saṃsāraṃ paśyantī sākṣivatsthitā 12

12. paramākāśanagaranāṭyamaṇḍapabhūmiṣu
svaśaktivṛttaṃ saṃsāraṃ paśyantī sākṣivat sthitā

12. paramākāśanagaranāṭyamaṇḍapabhūmiṣu
svaśaktivṛttaṃ saṃsāraṃ paśyantī sāksivat sthitā

12. She remains like a witness, observing the cycle of existence (saṃsāra) – the activity of her own power (śakti) – on the stages of the theater-city that is the supreme sky.

Words meanings summery:

• परमाकाशनगरनाट्यमण्डपभूमिषु (paramākāśanagaranāṭyamaṇḍapabhūmiṣu) - on the grounds, stages, or lands of the theater-city of the supreme sky

• स्वशक्तिवृत्तं (svaśaktivṛttaṁ) - the activity or play of one's own power (śakti)

• संसारं (saṁsāraṁ) - the cycle of rebirth, worldly existence (saṃsāra)

• पश्यन्ती (paśyantī) - seeing, observing

• साक्षिवत् (sākṣivat) - like a witness, as a witness

• स्थिता (sthitā) - stands, remains, situated

Words meanings and morphology

परमाकाशनगरनाट्यमण्डपभूमिषु (paramākāśanagaranāṭyamaṇḍapabhūmiṣu) - on the grounds, stages, or lands of the theater-city of the supreme sky

(noun)

Locative, feminine, plural of paramākāśanagaranāṭyamaṇḍapabhūmi

paramākāśanagaranāṭyamaṇḍapabhūmi - the grounds/stages of the theater-city of the supreme sky

Compound type : tatpuruṣa (parama+ākāśa+nagara+nāṭya+maṇḍapa+bhūmi)

• parama – supreme, highest, excellent
  adjective
• ākāśa – sky, space, ether
  noun (masculine)
• nagara – city, town
  noun (neuter)
• nāṭya – dance, drama, theatrical performance
  noun (neuter)
• maṇḍapa – pavilion, hall, temporary structure
  noun (masculine)
• bhūmi – ground, earth, land, stage
  noun (feminine)

स्वशक्तिवृत्तं (svaśaktivṛttaṁ) - the activity or play of one's own power (śakti)

(noun)

Accusative, neuter, singular of svaśaktivṛtta

svaśaktivṛtta - activity of one's own power (śakti), play of one's own power (śakti)

Compound type : tatpuruṣa (sva+śakti+vṛtta)

• sva – one's own
  adjective
• śakti – power, energy, divine feminine power (śakti)
  noun (feminine)
  From root śak (to be able)
  Root: śak (class 5)
• vṛtta – activity, occurrence, event, conduct, play
  noun (neuter)
  Past Passive Participle
  From root vṛt (to be, to exist, to revolve)
  Root: vṛt (class 1)

संसारं (saṁsāraṁ) - the cycle of rebirth, worldly existence (saṃsāra)

(noun)

Accusative, masculine, singular of saṃsāra

saṁsāra - transmigration, cycle of rebirth, worldly existence (saṃsāra)

From prefix sam- and root sṛ (to flow, to run)

Prefix: sam

Root: sṛ (class 1)

पश्यन्ती (paśyantī) - seeing, observing

(adjective)

Nominative, feminine, singular of paśyat

paśyat - seeing, observing

Present Active Participle

From root dṛś (to see), with present stem paśya

Root: dṛś (class 1)

साक्षिवत् (sākṣivat) - like a witness, as a witness

(indeclinable)

Derived from sākṣin (witness) + -vat (suffix for 'like')

स्थिता (sthitā) - stands, remains, situated

(adjective)

Nominative, feminine, singular of sthita

sthita - standing, situated, remaining

Past Passive Participle

From root sthā (to stand)

Root: sthā (class 1)

Note: Functions as a predicate adjective, implying 'She is standing.'