योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-55, verse-15

संरुद्धप्राणपवनः समसंस्थानकन्धरः ।
तालुमूलतलालग्नजिह्वामूलो लसन्मुखः ॥ १५ ॥

saṃruddhaprāṇapavanaḥ samasaṃsthānakandharaḥ ,
tālumūlatalālagnajihvāmūlo lasanmukhaḥ 15

15. saṃruddhaprāṇapavanaḥ samasaṃsthānakandharaḥ
tālumūlatallagnajihvāmūlaḥ lasanmukhaḥ

15. saṃruddhaprāṇapavanaḥ samasaṃsthānakandharaḥ
tālumūlatallagnajihvāmūlaḥ lasanmukhaḥ

15. Having fully restrained his vital breath (prāṇa-pavana), with his neck held perfectly straight, with the root of his tongue (jihvāmūla) pressed firmly against the base of his palate, and with a radiant face.

Words meanings summery:

• संरुद्धप्राणपवनः (saṁruddhaprāṇapavanaḥ) - having restrained the vital breath (prāṇa-pavana)

• समसंस्थानकन्धरः (samasaṁsthānakandharaḥ) - with the neck held straight

• तालुमूलतल्लग्नजिह्वामूलः (tālumūlatallagnajihvāmūlaḥ) - with the root of the tongue attached to the base of the palate

• लसन्मुखः (lasanmukhaḥ) - with a radiant face

Words meanings and morphology

संरुद्धप्राणपवनः (saṁruddhaprāṇapavanaḥ) - having restrained the vital breath (prāṇa-pavana)

(adjective)

Nominative, masculine, singular of saṃruddhaprāṇapavana

saṁruddhaprāṇapavana - one whose vital breath is restrained

Compound type : bahuvrīhi (saṃruddha+prāṇapavana)

• saṃruddha – restrained, obstructed
  adjective (masculine)
  Past Passive Participle
  Derived from root `rudh` (to obstruct) with `sam` prefix and `kta` suffix.
  Prefix: sam
  Root: rudh (class 7)
• prāṇapavana – vital breath, life-wind
  noun (masculine)

समसंस्थानकन्धरः (samasaṁsthānakandharaḥ) - with the neck held straight

(adjective)

Nominative, masculine, singular of samasaṃsthānakandhara

samasaṁsthānakandhara - one whose neck is in an even/straight posture

Compound type : bahuvrīhi (sama+saṃsthāna+kandhara)

• sama – even, equal, straight, upright
  adjective (masculine)
• saṃsthāna – posture, position, form
  noun (neuter)
  Prefix: sam
  Root: sthā (class 1)
• kandhara – neck
  noun (masculine)

तालुमूलतल्लग्नजिह्वामूलः (tālumūlatallagnajihvāmūlaḥ) - with the root of the tongue attached to the base of the palate

(adjective)

Nominative, masculine, singular of tālumūlatallagnajihvāmūla

tālumūlatallagnajihvāmūla - one whose root of the tongue is attached to the base of the palate

Compound type : bahuvrīhi (tālumūlatala+lagna+jihvāmūla)

• tālumūlatala – base of the root of the palate
  noun (neuter)
• lagna – attached, fixed, joined
  adjective (neuter)
  Past Passive Participle
  Derived from root `lag` (to attach, to stick) with `kta` suffix.
  Root: lag (class 1)
• jihvāmūla – root of the tongue
  noun (neuter)

लसन्मुखः (lasanmukhaḥ) - with a radiant face

(adjective)

Nominative, masculine, singular of lasanmukha

lasanmukha - one with a shining/radiant face

Compound type : bahuvrīhi (lasat+mukha)

• lasat – shining, radiant, playing
  adjective (masculine)
  Present Active Participle
  Derived from root `las` (to shine, to sport) with `śatṛ` suffix.
  Root: las (class 1)
• mukha – face, mouth
  noun (neuter)