योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-54, verse-10

अथेतरांशावसरे प्रणवस्य समस्थितौ ।
निष्कम्पकुम्भको नाम प्राणानामभवत्क्रमः ॥ १० ॥

athetarāṃśāvasare praṇavasya samasthitau ,
niṣkampakumbhako nāma prāṇānāmabhavatkramaḥ 10

10. atha itarāṃśāvasare praṇavasya samasthitau
niṣkampakumbhakaḥ nāma prāṇānām abhavat kramaḥ

10. atha samasthitau praṇavasya itarāṃśāvasare,
prāṇānām niṣkampakumbhakaḥ nāma kramaḥ abhavat

10. Then, in the balanced state, during the phase of the other aspect of the sacred syllable (praṇava), a stage for the vital airs (prāṇa) named 'motionless breath retention (kumbhaka)' occurred.

Words meanings summery:

• अथ (atha) - then (now, then, thereupon)

• इतरांशावसरे (itarāṁśāvasare) - during the phase of the other aspect (at the occasion of the other part/aspect)

• प्रणवस्य (praṇavasya) - of the sacred syllable (praṇava) (of praṇava (OM))

• समस्थितौ (samasthitau) - in the balanced state (in a state of equipoise, in a balanced condition)

• निष्कम्पकुम्भकः (niṣkampakumbhakaḥ) - motionless breath retention (kumbhaka)

• नाम (nāma) - named (by name, named, indeed)

• प्राणानाम् (prāṇānām) - for the vital airs (prāṇa) (of the breaths, of the vital airs (prāṇa))

• अभवत् (abhavat) - occurred (became, happened, occurred)

• क्रमः (kramaḥ) - stage (step, stage, order, sequence, method)

Words meanings and morphology

अथ (atha) - then (now, then, thereupon)

(indeclinable)

इतरांशावसरे (itarāṁśāvasare) - during the phase of the other aspect (at the occasion of the other part/aspect)

(noun)

Locative, masculine, singular of itarāṃśāvasara

itarāṁśāvasara - occasion of the other part/aspect

Compound type : tatpuruṣa (itara+aṃśa+avasara)

• itara – other, another
  adjective (masculine)
• aṃśa – part, portion, aspect
  noun (masculine)
• avasara – occasion, opportunity, turn, phase
  noun (masculine)
  From ava-√sṛ (to run down, descend).
  Prefix: ava
  Root: sṛ (class 1)

प्रणवस्य (praṇavasya) - of the sacred syllable (praṇava) (of praṇava (OM))

(noun)

Genitive, masculine, singular of praṇava

praṇava - the sacred syllable OM; a hum, a roar

From pra-√nu (to praise, to make a sound).

Prefix: pra

Root: nu (class 2)

समस्थितौ (samasthitau) - in the balanced state (in a state of equipoise, in a balanced condition)

(noun)

Locative, feminine, singular of samasthiti

samasthiti - balanced state, equipoise, steady condition

From sama (equal, balanced) + sthiti (state).

Compound type : karmadhāraya (sama+sthiti)

• sama – equal, even, balanced, tranquil
  adjective (masculine)
• sthiti – standing, state, condition, stability
  noun (feminine)
  Agent Noun
  From √sthā (to stand).
  Root: sthā (class 1)

निष्कम्पकुम्भकः (niṣkampakumbhakaḥ) - motionless breath retention (kumbhaka)

(noun)

Nominative, masculine, singular of niṣkampakumbhaka

niṣkampakumbhaka - motionless breath retention

Compound type : karmadhāraya (niṣkampa+kumbhaka)

• niṣkampa – motionless, unshaking, steady
  adjective (masculine)
  From nis-√kamp (to tremble).
  Prefix: nis
  Root: kamp (class 1)
• kumbhaka – breath retention, holding the breath (a practice in (yoga))
  noun (masculine)
  From kumbha (pot) implying holding breath like water in a pot.

नाम (nāma) - named (by name, named, indeed)

(indeclinable)

Note: Adverbial use.

प्राणानाम् (prāṇānām) - for the vital airs (prāṇa) (of the breaths, of the vital airs (prāṇa))

(noun)

Genitive, masculine, plural of prāṇa

prāṇa - breath, vital air, life-force

From pra-√an (to breathe forth).

Prefix: pra

Root: an (class 2)

अभवत् (abhavat) - occurred (became, happened, occurred)

(verb)

3rd person , singular, active, imperfect past (laṅ) of bhū

Imperfect Active

Augment a-, 3rd person singular active.

Root: bhū (class 1)

क्रमः (kramaḥ) - stage (step, stage, order, sequence, method)

(noun)

Nominative, masculine, singular of krama

krama - step, stage, order, sequence, method, procedure

From √kram (to step, to go).

Root: kram (class 1)