योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-80, verse-15

एकैवैकान्तनिरता स्वासनावस्थिताङ्गिका ।
ऊर्ध्वगप्राणपवनचिराभ्यासं चकार ह ॥ १५ ॥

ekaivaikāntaniratā svāsanāvasthitāṅgikā ,
ūrdhvagaprāṇapavanacirābhyāsaṃ cakāra ha 15

15. ekā eva ekāntaniratā svāsanāvasthitāṅgikā
ūrdhvagaprāṇapavanacirābhyāsam cakāra ha

15. ekā eva ekāntaniratā svāsanāvasthitāṅgikā
ūrdhvagaprāṇapavanacirābhyāsam cakāra ha

15. She alone, devoted to solitude and seated with her body in her own proper yogic posture (āsana), indeed performed a prolonged practice of directing the vital breath (prāṇa) upwards.

Words meanings summery:

• एका (ekā) - one, alone, single

• एव (eva) - only, just, indeed, alone

• एकान्तनिरता (ekāntaniratā) - devoted to solitude, immersed in seclusion

• स्वासनावस्थिताङ्गिका (svāsanāvasthitāṅgikā) - having her body situated in her own posture

• ऊर्ध्वगप्राणपवनचिराभ्यासम् (ūrdhvagaprāṇapavanacirābhyāsam) - a long-term practice of upward-moving vital breath

• चकार (cakāra) - she did, she performed

• ह (ha) - indeed, verily, surely

Words meanings and morphology

एका (ekā) - one, alone, single

(adjective)

Nominative, feminine, singular of eka

eka - one, single, alone, unique

एव (eva) - only, just, indeed, alone

(indeclinable)

एकान्तनिरता (ekāntaniratā) - devoted to solitude, immersed in seclusion

(adjective)

Nominative, feminine, singular of ekāntanirata

ekāntanirata - devoted to solitude, intent on seclusion

Compound type : tatpuruṣa (ekānta+nirata)

• ekānta – solitude, secluded place, exclusively
  noun (masculine)
• nirata – devoted to, engaged in, immersed in
  adjective
  Past Passive Participle
  Derived from root ram (to rejoice, be pleased) with prefix ni
  Prefix: ni
  Root: ram (class 1)

स्वासनावस्थिताङ्गिका (svāsanāvasthitāṅgikā) - having her body situated in her own posture

(adjective)

Nominative, feminine, singular of svāsanāvasthitāṅgikā

svāsanāvasthitāṅgikā - one whose body is situated in her own posture

Compound type : bahuvrīhi (sva+āsana+avasthita+aṅgikā)

• sva – own, self
  pronoun
• āsana – seat, posture (yogic)
  noun (neuter)
  Root: ās (class 2)
• avasthita – situated, abiding, standing, placed
  adjective
  Past Passive Participle
  Derived from root sthā (to stand) with prefixes ava
  Prefix: ava
  Root: sthā (class 1)
• aṅgikā – body (feminine form)
  noun (feminine)

ऊर्ध्वगप्राणपवनचिराभ्यासम् (ūrdhvagaprāṇapavanacirābhyāsam) - a long-term practice of upward-moving vital breath

(noun)

Accusative, masculine, singular of ūrdhvagaprāṇapavanacirābhyāsa

ūrdhvagaprāṇapavanacirābhyāsa - long-term practice of upward-moving vital breath

Compound type : tatpuruṣa (ūrdhvaga+prāṇa+pavana+cira+abhyāsa)

• ūrdhvaga – going upwards, ascending
  adjective
• prāṇa – vital breath, life-force, vital energy (prāṇa)
  noun (masculine)
  Prefix: pra
  Root: an (class 2)
• pavana – wind, air, breath
  noun (masculine)
  Root: pū (class 1)
• cira – long (time), lasting, ancient
  adjective
• abhyāsa – practice, exercise, repetition, study
  noun (masculine)
  Prefixes: abhi+ā
  Root: as (class 4)

चकार (cakāra) - she did, she performed

(verb)

3rd person , singular, active, perfect (liṭ) of kṛ

Root: kṛ (class 8)

ह (ha) - indeed, verily, surely

(indeclinable)