योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-71, verse-2

ओंकारार्धोऽर्धमात्रान्तः शान्तनिःशेषमानसः ।
लिपिकर्मार्पिताकार आसीदाशान्तवेदनः ॥ २ ॥

oṃkārārdho'rdhamātrāntaḥ śāntaniḥśeṣamānasaḥ ,
lipikarmārpitākāra āsīdāśāntavedanaḥ 2

2. oṃkārārdhaḥ ardhamātrāntaḥ śāntaniḥśeṣamānasaḥ
lipikarmārpitākāraḥ āsīt āśāntavedanaḥ

2. saḥ oṃkārārdhaḥ ardhamātrāntaḥ śāntaniḥśeṣamānasaḥ lipikarmārpitākāraḥ āśāntavedanaḥ āsīt.

2. His state was akin to the subtle half-mora (ardhamātrā) at the end of the sacred syllable Om (oṃkāra), with his mind (mānasa) entirely peaceful. His form, as if rendered into written letters, had become so tranquil that all sensation (vedana) ceased.

Words meanings summery:

• ॐकारार्धः (oṁkārārdhaḥ) - half of the Om syllable

• अर्धमात्रान्तः (ardhamātrāntaḥ) - having the half-mora at the end

• शान्तनिःशेषमानसः (śāntaniḥśeṣamānasaḥ) - one whose mind is completely calmed

• लिपिकर्मार्पिताकारः (lipikarmārpitākāraḥ) - whose form is entrusted to written characters, whose form is like a written letter

• आसीत् (āsīt) - he was

• आशान्तवेदनः (āśāntavedanaḥ) - one whose perception/sensation was completely calmed

Words meanings and morphology

ॐकारार्धः (oṁkārārdhaḥ) - half of the Om syllable

(noun)

Nominative, masculine, singular of oṃkārārdha

oṁkārārdha - half of the sacred syllable Om (oṃkāra)

Compound type : ṣaṣṭhī-tatpuruṣa (oṃkāra+ardha)

• oṃkāra – the sacred syllable Om
  noun (masculine)
• ardha – half, part
  noun (masculine)

अर्धमात्रान्तः (ardhamātrāntaḥ) - having the half-mora at the end

(adjective)

Nominative, masculine, singular of ardhamātrānta

ardhamātrānta - that which has the half-mora (ardhamātrā) at its end

Compound type : bahuvrīhi (ardhamātrā+anta)

• ardhamātrā – half-mora, the subtle nasal resonance after Om
  noun (feminine)
• anta – end, limit, boundary
  noun (masculine)

शान्तनिःशेषमानसः (śāntaniḥśeṣamānasaḥ) - one whose mind is completely calmed

(adjective)

Nominative, masculine, singular of śāntaniḥśeṣamānasa

śāntaniḥśeṣamānasa - one whose mind (mānasa) is entirely (niḥśeṣa) tranquil (śānta)

Compound type : bahuvrīhi (śānta+niḥśeṣa+mānasa)

• śānta – calmed, tranquil, peaceful
  adjective (masculine)
  Past Passive Participle
  Root: śam
• niḥśeṣa – without remainder, complete, entire
  adjective (masculine)
• mānasa – mind, mental
  noun (neuter)

लिपिकर्मार्पिताकारः (lipikarmārpitākāraḥ) - whose form is entrusted to written characters, whose form is like a written letter

(adjective)

Nominative, masculine, singular of lipikarmārpitākāra

lipikarmārpitākāra - one whose form (ākāra) is presented/entrusted (arpita) to the act of writing (lipikarma)

Compound type : bahuvrīhi (lipikarma+arpita+ākāra)

• lipikarma – act of writing, scribing
  noun (neuter)
• arpita – entrusted, placed, offered
  adjective (masculine)
  Past Passive Participle
  Root: ṛp
• ākāra – form, shape, appearance
  noun (masculine)

आसीत् (āsīt) - he was

(verb)

3rd person , singular, active, imperfect (laṅ) of as

Root: as (class 2)

आशान्तवेदनः (āśāntavedanaḥ) - one whose perception/sensation was completely calmed

(adjective)

Nominative, masculine, singular of āśāntavedana

āśāntavedana - one whose perception/sensation (vedana) is completely (ā) tranquil (śānta)

Compound type : bahuvrīhi (ā+śānta+vedana)

• ā – completely, fully (prefix)
  indeclinable
• śānta – calmed, tranquil, peaceful
  adjective (masculine)
  Past Passive Participle
  Root: śam
• vedana – perception, sensation, feeling
  noun (neuter)
  Root: vid