योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-128, verse-2

मृद्वासने समासीनो जितचित्तेन्द्रियक्रियः ।
ओमित्युच्चारयेत्तावन्मनो यावत्प्रसीदति ॥ २ ॥

mṛdvāsane samāsīno jitacittendriyakriyaḥ ,
omityuccārayettāvanmano yāvatprasīdati 2

2. mṛdāsane samāsīnaḥ jitacittendriyakriyaḥ om
iti uccārayet tāvat manaḥ yāvat prasīdati

2. jitacittendriyakriyaḥ mṛdāsane samāsīnaḥ,
manaḥ yāvat prasīdati tāvat om iti uccārayet.

2. Seated on a soft mat [made of grass or clay], with the activities of their mind and senses controlled, one should chant 'Om' until their mind becomes tranquil.

Words meanings summery:

• मृदासने (mṛdāsane) - on a soft seat (of grass or earth)

• समासीनः (samāsīnaḥ) - seated, sitting firmly

• जितचित्तेन्द्रियक्रियः (jitacittendriyakriyaḥ) - one whose mind and sense activities are conquered

• ओम् (om) - the sacred syllable Om

• इति (iti) - thus, in this manner, marking direct speech/thought

• उच्चारयेत् (uccārayet) - should utter, should pronounce, should chant

• तावत् (tāvat) - so long, so much, until then

• मनः (manaḥ) - mind, intellect

• यावत् (yāvat) - until, as long as

• प्रसीदति (prasīdati) - becomes tranquil, becomes clear, becomes pleased

Words meanings and morphology

मृदासने (mṛdāsane) - on a soft seat (of grass or earth)

(noun)

Locative, neuter, singular of mṛdāsana

mṛdāsana - a seat made of soft earth or grass, soft mat

Compound type : tatpuruṣa (mṛd+āsana)

• mṛd – clay, earth, soft
  noun (feminine)
• āsana – seat, sitting posture
  noun (neuter)
  From √ās + ana
  Root: ās (class 2)

समासीनः (samāsīnaḥ) - seated, sitting firmly

(adjective)

Nominative, masculine, singular of samāsīna

samāsīna - seated, sitting down, settled

Past Active Participle

From sam + ā + √ās + śānac (middle participle)

Prefixes: sam+ā

Root: ās (class 2)

Note: Refers to the practitioner.

जितचित्तेन्द्रियक्रियः (jitacittendriyakriyaḥ) - one whose mind and sense activities are conquered

(adjective)

Nominative, masculine, singular of jitacittendriyakriya

jitacittendriyakriya - one who has conquered the activities of mind and senses

Compound type : bahuvrīhi (jita+citta+indriya+kriyā)

• jita – conquered, vanquished
  adjective (neuter)
  Past Passive Participle
  From √ji + kta
  Root: ji (class 1)
• citta – mind, consciousness, thought
  noun (neuter)
  From √cit + ta
  Root: cit (class 1)
• indriya – sense organ, faculty
  noun (neuter)
  From indra + ya
• kriyā – action, activity, performance
  noun (feminine)
  From √kṛ + ya + ā
  Root: kṛ (class 8)

Note: Qualifies the implicit agent (the meditator).

ओम् (om) - the sacred syllable Om

(indeclinable)

Note: Used as a sound or name.

इति (iti) - thus, in this manner, marking direct speech/thought

(indeclinable)

उच्चारयेत् (uccārayet) - should utter, should pronounce, should chant

(verb)

3rd person , singular, active, optative (vidhilin) of uccāray

Causative

From ut + √car + ṇic (causative) + vidhilin (optative) ending

Prefix: ut

Root: car (class 1)

Note: Implies a recommendation or command.

तावत् (tāvat) - so long, so much, until then

(indeclinable)

Correlative to yāvat

मनः (manaḥ) - mind, intellect

(noun)

Nominative, neuter, singular of manas

manas - mind, intellect, mental faculty

Root: man (class 4)

Note: Subject of prasīdati.

यावत् (yāvat) - until, as long as

(indeclinable)

Correlative to tāvat

प्रसीदति (prasīdati) - becomes tranquil, becomes clear, becomes pleased

(verb)

3rd person , singular, active, present (laṭ) of prasīd

From pra + √sad

Prefix: pra

Root: sad (class 1)