योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-15, verse-29

प्राणस्पन्दावधानेन नित्यमन्तर्मुखः सुखी ।
चिरंजीवीति विख्यातश्चिरजीवितया तया ॥ २९ ॥

prāṇaspandāvadhānena nityamantarmukhaḥ sukhī ,
ciraṃjīvīti vikhyātaścirajīvitayā tayā 29

29. prāṇaspanda-avadhānena nityam antarmukhaḥ
sukhī cirañjīvī iti vikhyātaḥ cirajīvitayā tayā

29. (saḥ) nityam prāṇaspanda-avadhānena antarmukhaḥ sukhī (āsīt) (saḥ) tayā cirajīvitayā cirañjīvī iti vikhyātaḥ (āsīt) ।

29. Always introspective and happy due to his concentration (dhyāna) on the vibration of life-force (prāṇa), he was renowned as 'Chirañjīvī' (long-lived) because of that very longevity.

Words meanings summery:

• प्राणस्पन्द-अवधानेन (prāṇaspanda-avadhānena) - by the concentration on the vibration/movement of life force (prāṇa)

• नित्यम् (nityam) - always, constantly, eternally

• अन्तर्मुखः (antarmukhaḥ) - inward-focused, introspective

• सुखी (sukhī) - happy, blissful, comfortable

• चिरञ्जीवी (cirañjīvī) - Here, functioning as a title or epithet, 'Chirañjīvī'. (long-lived, immortal)

• इति (iti) - thus, so, indicating a quote or designation

• विख्यातः (vikhyātaḥ) - renowned, famous, well-known

• चिरजीवितया (cirajīvitayā) - by longevity, by long life

• तया (tayā) - Refers to 'cirajīvitayā'. (by that, by her)

Words meanings and morphology

प्राणस्पन्द-अवधानेन (prāṇaspanda-avadhānena) - by the concentration on the vibration/movement of life force (prāṇa)

(noun)

Instrumental, neuter, singular of prāṇaspandāvadhāna

prāṇaspandāvadhāna - concentration on the vibration of life force

Compound type : tatpuruṣa (prāṇa+spanda+avadhāna)

• prāṇa – life-force, breath, vital air (prāṇa)
  noun (masculine)
  Prefix: pra
  Root: an (class 2)
• spanda – vibration, throbbing, movement
  noun (masculine)
  Root: spand (class 1)
• avadhāna – attention, concentration, care (dhyāna)
  noun (neuter)
  From root 'dhā' (to place) with prefixes 'ava' (down) and 'ā' (to, near).
  Prefixes: ava+ā
  Root: dhā (class 3)

नित्यम् (nityam) - always, constantly, eternally

(indeclinable)

अन्तर्मुखः (antarmukhaḥ) - inward-focused, introspective

(adjective)

Nominative, masculine, singular of antarmukha

antarmukha - inward-faced, introspective, turned inwards

Compound type : tatpuruṣa (antar+mukha)

• antar – within, inside, inward
  indeclinable
• mukha – face, mouth, opening, direction
  noun (neuter)

Note: Agrees with the implied subject (Bhusuṇḍa).

सुखी (sukhī) - happy, blissful, comfortable

(adjective)

Nominative, masculine, singular of sukhin

sukhin - happy, blissful, comfortable, joyous

From 'sukha' (happiness) + possessive suffix '-in'.

Note: Agrees with the implied subject (Bhusuṇḍa).

चिरञ्जीवी (cirañjīvī) - Here, functioning as a title or epithet, 'Chirañjīvī'. (long-lived, immortal)

(adjective)

Nominative, masculine, singular of cirañjīvin

cirañjīvin - long-lived, immortal, lasting a long time

From 'cira' (long time) + 'jīvin' (living).

Compound type : tatpuruṣa (cira+jīvin)

• cira – long (time), for a long time
  indeclinable
• jīvin – living, alive, a living being
  adjective (masculine)
  From root 'jīv' (to live) with suffix '-in'.
  Root: jīv (class 1)

Note: Used as a predicate adjective, or as part of the designation 'Chirañjīvī'.

इति (iti) - thus, so, indicating a quote or designation

(indeclinable)

विख्यातः (vikhyātaḥ) - renowned, famous, well-known

(adjective)

Nominative, masculine, singular of vikhyāta

vikhyāta - renowned, famous, well-known, celebrated

Past Passive Participle

From root 'khyā' (to tell, to be called) with prefix 'vi' (forth, widely).

Prefix: vi

Root: khyā (class 2)

Note: Agrees with the implied subject (Bhusuṇḍa).

चिरजीवितया (cirajīvitayā) - by longevity, by long life

(noun)

Instrumental, feminine, singular of cirajīvitā

cirajīvitā - longevity, long life

From 'cirajīvin' (long-lived) with suffix '-tā' (abstract noun).

तया (tayā) - Refers to 'cirajīvitayā'. (by that, by her)

(pronoun)

Instrumental, feminine, singular of tad

tad - that, her

Feminine instrumental singular of 'tad'.