योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-92, verse-27

प्राणायामचिराभ्यासैर्युक्त्या च गुरुदत्तया ।
आसनाशनयोगेन प्राणस्पन्दो निरुद्ध्यते ॥ २७ ॥

prāṇāyāmacirābhyāsairyuktyā ca gurudattayā ,
āsanāśanayogena prāṇaspando niruddhyate 27

27. prāṇāyāmacirābhyāsaiḥ yuktyā ca gurudattayā
āsanāśanayogena prāṇaspandaḥ nirudhyate

27. prāṇaspandaḥ prāṇāyāmacirābhyāsaiḥ ca
gurudattayā yuktyā āsanāśanayogena nirudhyate

27. The pulsation of the vital breath is restrained through prolonged practices of breath control, by the method imparted by a spiritual teacher (guru), and through the proper application (yoga) of posture and diet.

Words meanings summery:

• प्राणायामचिराभ्यासैः (prāṇāyāmacirābhyāsaiḥ) - by long practices of breath control

• युक्त्या (yuktyā) - by means, by method, by proper application

• च (ca) - and, also

• गुरुदत्तया (gurudattayā) - by that given by the spiritual teacher (guru)

• आसनाशनयोगेन (āsanāśanayogena) - by the proper application (yoga) of posture and diet

• प्राणस्पन्दः (prāṇaspandaḥ) - the pulsation of the vital breath

• निरुध्यते (nirudhyate) - is restrained, is suppressed, is obstructed

Words meanings and morphology

प्राणायामचिराभ्यासैः (prāṇāyāmacirābhyāsaiḥ) - by long practices of breath control

(noun)

Instrumental, masculine, plural of prāṇāyāmacirābhyāsa

prāṇāyāmacirābhyāsa - long-term practice of breath control

Compound type : tatpuruṣa (prāṇāyāma+cira+abhyāsa)

• prāṇāyāma – breath control, extension of vital breath
  noun (masculine)
  Compound of prāṇa (vital breath) and āyāma (extension).
• cira – long (time), lasting, old
  adjective
• abhyāsa – practice, repetition, study
  noun (masculine)
  verbal noun
  Derived from root as (to throw, here to practice) with upasarga abhi, forming a bhāve ghañ nominalization.
  Prefix: abhi
  Root: as (class 4)

युक्त्या (yuktyā) - by means, by method, by proper application

(noun)

Instrumental, feminine, singular of yukti

yukti - method, means, device, proper application

verbal noun

Derived from root yuj (to join, apply).

Root: yuj (class 7)

च (ca) - and, also

(indeclinable)

गुरुदत्तया (gurudattayā) - by that given by the spiritual teacher (guru)

(adjective)

Instrumental, feminine, singular of gurudatta

gurudatta - given by a spiritual teacher

Compound type : tatpuruṣa (guru+datta)

• guru – spiritual teacher, preceptor
  noun (masculine)
• datta – given, granted
  adjective
  Past Passive Participle
  Derived from root dā (to give).
  Root: dā (class 3)

आसनाशनयोगेन (āsanāśanayogena) - by the proper application (yoga) of posture and diet

(noun)

Instrumental, masculine, singular of āsanāśanayoga

āsanāśanayoga - proper application of posture and diet

Compound type : dvandva (āsana+āśana+yoga)

• āsana – posture, sitting, seat
  noun (neuter)
  verbal noun
  Derived from root ās (to sit).
  Root: ās (class 2)
• āśana – food, eating
  noun (neuter)
  verbal noun
  Derived from root aś (to eat).
  Root: aś (class 9)
• yoga – (yoga), union, conjunction, application, means
  noun (masculine)
  verbal noun
  Derived from root yuj (to join).
  Root: yuj (class 7)

प्राणस्पन्दः (prāṇaspandaḥ) - the pulsation of the vital breath

(noun)

Nominative, masculine, singular of prāṇaspanda

prāṇaspanda - pulsation of vital breath

Compound type : tatpuruṣa (prāṇa+spanda)

• prāṇa – vital breath, life force
  noun (masculine)
• spanda – pulsation, vibration, quiver
  noun (masculine)
  verbal noun
  Derived from root spand (to tremble, vibrate).
  Root: spand (class 1)

निरुध्यते (nirudhyate) - is restrained, is suppressed, is obstructed

(verb)

3rd person , singular, passive, present (laṭ) of ni-rudh

Prefix: ni

Root: rudh (class 7)