योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-91, verse-37

अवासनत्वात्सततं यदा न मनुते मनः ।
अमनस्ता तदोदेति परमोपशमप्रदा ॥ ३७ ॥

avāsanatvātsatataṃ yadā na manute manaḥ ,
amanastā tadodeti paramopaśamapradā 37

37. avāsanatvāt satatam yadā na manute manaḥ
amanastā tadā udeti paramopaśamapradā

37. yadā manas avāsanatvāt satatam na manute
tadā paramopaśamapradā amanastā udeti

37. When the mind (manas) constantly does not perceive due to being free from latent impressions (vāsanā), then a state of no-mind (amanastā) arises, which bestows supreme tranquility.

Words meanings summery:

• अवासनत्वात् (avāsanatvāt) - due to being free from latent impressions (vāsanā), due to non-impressions

• सततम् (satatam) - constantly, always, perpetually

• यदा (yadā) - when

• न (na) - not, no

• मनुते (manute) - it thinks, it perceives, it considers

• मनः (manaḥ) - mind, intellect, thought

• अमनस्ता (amanastā) - the state of no-mind, mindlessness

• तदा (tadā) - then, at that time

• उदेति (udeti) - it arises, it appears, it comes forth

• परमोपशमप्रदा (paramopaśamapradā) - bestowing supreme tranquility/peace

Words meanings and morphology

अवासनत्वात् (avāsanatvāt) - due to being free from latent impressions (vāsanā), due to non-impressions

(noun)

Ablative, neuter, singular of avāsanatva

avāsanatva - the state of being without latent impressions

Compound of 'a' (not) and 'vāsanatva' (the state of having vāsanās)

Compound type : nañ-tatpuruṣa (a+vāsanatva)

• a – not, non-, un-
  indeclinable
  Negative prefix
• vāsanatva – the state of having vāsanās (latent impressions)
  noun (neuter)
  Derived from 'vāsanā' (latent impression) with suffix '-tva' (state of being)

सततम् (satatam) - constantly, always, perpetually

(indeclinable)

Past passive participle of root 'tan' (to stretch) with prefix 'sa' (together) and reduplication

Root: tan (class 8)

यदा (yadā) - when

(indeclinable)

न (na) - not, no

(indeclinable)

मनुते (manute) - it thinks, it perceives, it considers

(verb)

3rd person , singular, middle, present (laṭ) of man

Root: man (class 4)

मनः (manaḥ) - mind, intellect, thought

(noun)

Nominative, neuter, singular of manas

manas - mind, intellect, understanding, thought, conscience

Root: man (class 4)

अमनस्ता (amanastā) - the state of no-mind, mindlessness

(noun)

Nominative, feminine, singular of amanastā

amanastā - state of no-mind, absence of mind, non-mental state

Compound of 'a' (not) and 'manas' (mind) with suffix '-tā' (state of being)

Compound type : nañ-tatpuruṣa (a+manas)

• a – not, non-, un-
  indeclinable
  Negative prefix
• manas – mind, intellect, understanding, thought, conscience
  noun (neuter)
  Root: man (class 4)

तदा (tadā) - then, at that time

(indeclinable)

उदेति (udeti) - it arises, it appears, it comes forth

(verb)

3rd person , singular, active, present (laṭ) of ud-i

Prefix: ud

Root: i (class 2)

परमोपशमप्रदा (paramopaśamapradā) - bestowing supreme tranquility/peace

(adjective)

Nominative, feminine, singular of paramopaśamaprada

paramopaśamaprada - giving or bestowing supreme tranquility

Compound of 'parama' (supreme), 'upaśama' (tranquility), and 'prada' (giving)

Compound type : tatpuruṣa (parama+upaśama+prada)

• parama – supreme, highest, utmost, excellent
  adjective
• upaśama – cessation, tranquility, calmness, peace
  noun (masculine)
  Derived from root śam (to be calm) with prefix upa
  Prefix: upa
  Root: śam (class 4)
• prada – giving, bestowing, granting
  adjective
  Derived from root dā (to give) with prefix pra
  Prefix: pra
  Root: dā (class 3)

Note: Agrees with 'amanastā'