योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-27, verse-32

ओंकारादर्धमात्रार्थं भावयन्मौनमास्थितः ।
संशान्तसर्वसंकल्पः प्रशान्तकलनागणः ॥ ३२ ॥

oṃkārādardhamātrārthaṃ bhāvayanmaunamāsthitaḥ ,
saṃśāntasarvasaṃkalpaḥ praśāntakalanāgaṇaḥ 32

32. oṃkārāt ardhamātrārtham bhāvayan maunam āsthitaḥ
| saṃśāntasarvasaṃkalpaḥ praśāntakalanāgaṇaḥ ||

32. oṃkārāt ardhamātrārtham bhāvayan,
maunam āsthitaḥ,
saṃśāntasarvasaṃkalpaḥ,
praśāntakalanāgaṇaḥ (saḥ āsīt).

32. Contemplating the significance of the half-mora (the transcendent aspect) of the sacred sound Om, he became established in silence. All his resolves were completely calmed, and the multitude of his mental constructs (kalanā) was entirely quieted.

Words meanings summery:

• ॐकारात् (oṁkārāt) - from Om, from the sacred syllable Om

• अर्धमात्रार्थम् (ardhamātrārtham) - the meaning of the half-mora, for the sake of the half-mora

• भावयन् (bhāvayan) - contemplating, realizing, meditating upon

• मौनम् (maunam) - silence

• आस्थितः (āsthitaḥ) - established, settled, resorted to

• संशान्तसर्वसंकल्पः (saṁśāntasarvasaṁkalpaḥ) - whose all resolves are completely calmed

• प्रशान्तकलनागणः (praśāntakalanāgaṇaḥ) - whose multitude of imaginings is completely quieted

Words meanings and morphology

ॐकारात् (oṁkārāt) - from Om, from the sacred syllable Om

(noun)

Ablative, masculine, singular of oṃkāra

oṁkāra - the sacred syllable Om

अर्धमात्रार्थम् (ardhamātrārtham) - the meaning of the half-mora, for the sake of the half-mora

(noun)

Accusative, masculine, singular of ardhamātrārtha

ardhamātrārtha - the meaning or purpose of the half-mora (the transcendent aspect of Om)

Compound type : tatpurusha (ardhamātrā+artha)

• ardhamātrā – half-mora, the fourth part of Om representing turiya
  noun (feminine)
• artha – meaning, purpose, object
  noun (masculine)

भावयन् (bhāvayan) - contemplating, realizing, meditating upon

(adjective)

Nominative, masculine, singular of bhāvayat

bhāvayat - causing to be, producing, contemplating

Present Active Participle

Causal form of bhū.

Root: bhū (class 1)

मौनम् (maunam) - silence

(noun)

Accusative, neuter, singular of mauna

mauna - silence

आस्थितः (āsthitaḥ) - established, settled, resorted to

(adjective)

Nominative, masculine, singular of āsthita

āsthita - established in, settled in, having resorted to

Past Passive Participle

Prefix: ā

Root: sthā (class 1)

संशान्तसर्वसंकल्पः (saṁśāntasarvasaṁkalpaḥ) - whose all resolves are completely calmed

(adjective)

Nominative, masculine, singular of saṃśāntasarvasaṃkalpa

saṁśāntasarvasaṁkalpa - one whose all resolves are completely calmed

Compound type : bahuvrihi (saṃśānta+sarva+saṃkalpa)

• saṃśānta – completely calmed, thoroughly tranquilized
  adjective (masculine)
  Past Passive Participle
  Prefix: sam
  Root: śam (class 4)
• sarva – all, every
  adjective (masculine)
• saṃkalpa – resolve, intention, mental faculty of willing
  noun (masculine)

प्रशान्तकलनागणः (praśāntakalanāgaṇaḥ) - whose multitude of imaginings is completely quieted

(adjective)

Nominative, masculine, singular of praśāntakalanāgaṇa

praśāntakalanāgaṇa - one whose multitude of imaginings is completely quieted

Compound type : bahuvrihi (praśānta+kalanāgaṇa)

• praśānta – completely tranquil, utterly quieted
  adjective (masculine)
  Past Passive Participle
  Prefix: pra
  Root: śam (class 4)
• kalanāgaṇa – multitude of imaginings/calculations
  noun (masculine)