योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-71, verse-19

विविक्तमनसां बुद्धौ क्व स्फुरन्ति हताशयाः ।
ग्राममार्गतृणानीव गिरेरुपरिवासिनाम् ॥ १९ ॥

viviktamanasāṃ buddhau kva sphuranti hatāśayāḥ ,
grāmamārgatṛṇānīva gireruparivāsinām 19

19. viviktamanasām buddhau kva sphuranti hatāśayāḥ
| grāmamārga-tṛṇāni iva gireḥ uparivāsinām ||

19. विविक्तमनसाम् गिरेः उपरिवासिनाम् बुद्धौ हताशयाः ग्राममार्गतृणानि इव क्व स्फुरन्ति ।

19. Where do such despondent thoughts (hatāśayāḥ) manifest in the intellect (buddhi) of those with purified minds (viviktamanas)? It is like blades of grass on a village path appearing [insignificant] to those who reside high upon a mountain.

Words meanings summery:

• विविक्तमनसाम् (viviktamanasām) - of those with purified/isolated/clear minds

• बुद्धौ (buddhau) - in the intellect, in the understanding

• क्व (kva) - where (rhetorical question, implying 'nowhere') (where, in what place)

• स्फुरन्ति (sphuranti) - they manifest, they arise (they flash, they tremble, they appear, they manifest)

• हताशयाः (hatāśayāḥ) - despondent thoughts (those whose hopes are destroyed, despondent ones, despondent intentions/thoughts)

• ग्राममार्ग-तृणानि (grāmamārga-tṛṇāni) - grass on a village path

• इव (iva) - like, as, as if

• गिरेः (gireḥ) - of a mountain, from a mountain

• उपरिवासिनाम् (uparivāsinām) - of those dwelling on a mountain (of those dwelling above, of residents on top)

Words meanings and morphology

विविक्तमनसाम् (viviktamanasām) - of those with purified/isolated/clear minds

(adjective)

Genitive, plural of viviktamanas

viviktamanas - having a purified/clear mind

Compound type : bahuvrīhi (vivikta+manas)

• vivikta – separated, solitary, pure, clear, distinct
  adjective (masculine)
  Past Passive Participle
  From root vic- (to separate, sift) with upasarga vi- (apart)
  Prefix: vi
  Root: vic (class 7)
• manas – mind, intellect, thought
  noun (neuter)
  From root man- (to think)
  Root: man (class 4)

बुद्धौ (buddhau) - in the intellect, in the understanding

(noun)

Locative, feminine, singular of buddhi

buddhi - intellect, understanding, perception, reason

From root budh- (to know, perceive)

Root: budh (class 1)

क्व (kva) - where (rhetorical question, implying 'nowhere') (where, in what place)

(indeclinable)

स्फुरन्ति (sphuranti) - they manifest, they arise (they flash, they tremble, they appear, they manifest)

(verb)

3rd person , plural, active, present (laṭ) of sphur

Present Tense

Root: sphur (class 6)

हताशयाः (hatāśayāḥ) - despondent thoughts (those whose hopes are destroyed, despondent ones, despondent intentions/thoughts)

(noun)

Nominative, masculine, plural of hatāśaya

hatāśaya - one whose hopes are destroyed, despondent; frustrated intention/thought

Compound type : bahuvrīhi (hata+āśaya)

• hata – struck, killed, destroyed, ruined
  adjective (masculine)
  Past Passive Participle
  From root han- (to strike, kill)
  Root: han (class 2)
• āśaya – intention, hope, desire, purpose, abode
  noun (masculine)
  From root śī- (to lie, reside) with upasarga ā-
  Prefix: ā
  Root: śī (class 2)

Note: Can refer to persons or thoughts/intentions. Context suggests 'thoughts'.

ग्राममार्ग-तृणानि (grāmamārga-tṛṇāni) - grass on a village path

(noun)

Nominative, neuter, plural of grāmamārga-tṛṇa

grāmamārga-tṛṇa - grass on a village path

Compound type : tatpuruṣa (grāmamārga+tṛṇa)

• grāmamārga – village path/road
  noun (masculine)
• tṛṇa – grass, straw, blade of grass
  noun (neuter)

इव (iva) - like, as, as if

(indeclinable)

गिरेः (gireḥ) - of a mountain, from a mountain

(noun)

Genitive, masculine, singular of giri

giri - mountain, hill

उपरिवासिनाम् (uparivāsinām) - of those dwelling on a mountain (of those dwelling above, of residents on top)

(noun)

Genitive, plural of uparivāsin

uparivāsin - dwelling above, residing on top

Compound type : tatpuruṣa (upari+vāsin)

• upari – above, on, upon, over
  indeclinable
• vāsin – dweller, inhabitant, resident
  adjective/noun (masculine)
  Agent noun from root vas- (to dwell)
  Root: vas (class 1)