योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-64, verse-13

क्वचित्प्रकटसर्वार्थो मनो मतिमतामिव ।
क्वचिदत्यन्तगहनो मूर्खश्रोत्रियचित्तवत् ॥ १३ ॥

kvacitprakaṭasarvārtho mano matimatāmiva ,
kvacidatyantagahano mūrkhaśrotriyacittavat 13

13. kvacit prakaṭasarvārthaḥ manaḥ matimatām iva
kvacit atyantagahanaḥ mūrkhaśrotriyacittavat

13. kvacit manaḥ matimatām iva prakaṭasarvārthaḥ
kvacit mūrkhaśrotriyacittavat atyantagahanaḥ

13. Sometimes it makes all meanings clear, like the mind (manas) of the intelligent. Sometimes it is exceedingly obscure, like the mind (citta) of a foolish scholar.

Words meanings summery:

• क्वचित् (kvacit) - sometimes, somewhere, in some respect

• प्रकटसर्वार्थः (prakaṭasarvārthaḥ) - having all meanings manifest/clear, evident in all respects

• मनः (manaḥ) - mind, intellect, consciousness (manas)

• मतिमताम् (matimatām) - of intelligent ones, of wise people

• इव (iva) - like, as, as if

• क्वचित् (kvacit) - sometimes, somewhere, in some respect

• अत्यन्तगहनः (atyantagahanaḥ) - extremely deep, very profound, very difficult to understand

• मूर्खश्रोत्रियचित्तवत् (mūrkhaśrotriyacittavat) - like the mind (citta) of a foolish ritualist/scholar

Words meanings and morphology

क्वचित् (kvacit) - sometimes, somewhere, in some respect

(indeclinable)

formed from interrogative pronoun base 'ka' + indefinite particle 'cit'

प्रकटसर्वार्थः (prakaṭasarvārthaḥ) - having all meanings manifest/clear, evident in all respects

(adjective)

Nominative, masculine, singular of prakaṭasarvārtha

prakaṭasarvārtha - having all purposes manifest, clear in all aspects

Compound type : bahuvrihi (prakaṭa+sarva+artha)

• prakaṭa – manifest, evident, clear
  adjective
  Past Passive Participle
  From root 'kaṭ' with prefix 'pra' (to appear, become visible)
  Prefix: pra
  Root: kaṭ (class 10)
• sarva – all, every, whole
  adjective
• artha – meaning, purpose, object, wealth
  noun (masculine)

मनः (manaḥ) - mind, intellect, consciousness (manas)

(noun)

Nominative, neuter, singular of manas

manas - mind, intellect, consciousness, faculty of perception and thought

Root: man

मतिमताम् (matimatām) - of intelligent ones, of wise people

(adjective)

Genitive, masculine, plural of matimat

matimat - intelligent, wise, thoughtful

formed with 'matup' suffix from 'mati' (mind, intelligence)

Note: Used substantively as 'intelligent ones'.

इव (iva) - like, as, as if

(indeclinable)

क्वचित् (kvacit) - sometimes, somewhere, in some respect

(indeclinable)

formed from interrogative pronoun base 'ka' + indefinite particle 'cit'

अत्यन्तगहनः (atyantagahanaḥ) - extremely deep, very profound, very difficult to understand

(adjective)

Nominative, masculine, singular of atyantagahana

atyantagahana - extremely deep/profound/impenetrable

Compound type : tatpurusha (atyanta+gahana)

• atyanta – extreme, excessive; extremely
  adjective
  from 'ati' (beyond) + 'anta' (end)
  Prefix: ati
• gahana – deep, profound, dense, impenetrable, obscure
  adjective (masculine)
  from root 'gah' (to be deep)
  Root: gah (class 1)

मूर्खश्रोत्रियचित्तवत् (mūrkhaśrotriyacittavat) - like the mind (citta) of a foolish ritualist/scholar

(indeclinable)

formed by adding the adverbial suffix 'vat' (like, similar to) to the compound 'mūrkhaśrotriyacitta'

Compound type : tatpurusha (mūrkha+śrotriya+citta+vat)

• mūrkha – fool, ignorant person, stupid
  adjective (masculine)
  from root 'murch' (to become stiff, dull)
  Root: murch (class 1)
• śrotriya – one learned in the Vedas, a Vedic scholar, a ritualist
  noun (masculine)
  from 'śrotra' (ear, Veda)
  Root: śru (class 5)
• citta – mind, thought, consciousness (citta)
  noun (neuter)
  Past Passive Participle
  From root 'cit' (to perceive, think)
  Root: cit (class 1)
• vat – like, similar to, as
  indeclinable
  Primary suffix 'vat' (also 'mati', 'vatuP').

Note: Adverbial use of 'vat'.