महाभारतः mahābhārataḥ - book-12, chapter-187, verse-21

पुरुषाधिष्ठिता बुद्धिस्त्रिषु भावेषु वर्तते ।
कदाचिल्लभते प्रीतिं कदाचिदनुशोचति ॥२१॥

21. puruṣādhiṣṭhitā buddhistriṣu bhāveṣu vartate ,
kadācillabhate prītiṁ kadācidanuśocati.

21. puruṣādhiṣṭhitā buddhiḥ triṣu bhāveṣu vartate
kadācit labhate prītim kadācit anuśocati

21. puruṣādhiṣṭhitā buddhiḥ triṣu bhāveṣu vartate
kadācit prītim labhate kadācit anuśocati

21. The intellect (buddhi), presided over by the cosmic person (puruṣa), operates within three states. Sometimes it experiences joy, and sometimes it grieves.

Words meanings summery:

• पुरुषाधिष्ठिता (puruṣādhiṣṭhitā) - presided over by the cosmic person

• बुद्धिः (buddhiḥ) - intellect, understanding

• त्रिषु (triṣu) - in the three states (referring to the gunas) (in the three)

• भावेषु (bhāveṣu) - in the three modes of nature (gunas) (in the states, in the modes, in the conditions)

• वर्तते (vartate) - exists, operates, functions, is present

• कदाचित् (kadācit) - sometimes, at some time, occasionally

• लभते (labhate) - obtains, receives, experiences, gets

• प्रीतिम् (prītim) - joy, pleasure, affection, love

• कदाचित् (kadācit) - sometimes, at some time, occasionally

• अनुशोचति (anuśocati) - grieves, laments, regrets

Words meanings and morphology

पुरुषाधिष्ठिता (puruṣādhiṣṭhitā) - presided over by the cosmic person

(adjective)

Nominative, feminine, singular of puruṣādhiṣṭhita

puruṣādhiṣṭhita - presided over by the (cosmic) person

Past Passive Participle (of adhi-sthā)

Compound type : instrumental tatpuruṣa (puruṣa+adhiṣṭhita)

• puruṣa – man, person, cosmic person, spirit
  noun (masculine)
• adhiṣṭhita – presided over, occupied, established, controlled
  adjective (masculine)
  Past Passive Participle
  From root 'sthā' with prefix 'adhi'.
  Prefix: adhi
  Root: sthā (class 1)

Note: Modifies 'buddhiḥ'.

बुद्धिः (buddhiḥ) - intellect, understanding

(noun)

Nominative, feminine, singular of buddhi

buddhi - intellect, understanding, reason, discernment, perception

From root 'budh' (to know, perceive) + suffix -ti.

Root: budh (class 1)

त्रिषु (triṣu) - in the three states (referring to the gunas) (in the three)

(adjective)

Locative, masculine, plural of tri

tri - three

Note: Can be masculine, feminine, or neuter. Here it modifies 'bhāveṣu' (masculine).

भावेषु (bhāveṣu) - in the three modes of nature (gunas) (in the states, in the modes, in the conditions)

(noun)

Locative, masculine, plural of bhāva

bhāva - state, mode, condition, existence, nature, emotion, sentiment

From root 'bhū' (to be, to exist).

Root: bhū (class 1)

वर्तते (vartate) - exists, operates, functions, is present

(verb)

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

Root: vṛt (class 1)

कदाचित् (kadācit) - sometimes, at some time, occasionally

(indeclinable)

लभते (labhate) - obtains, receives, experiences, gets

(verb)

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

Root: labh (class 1)

प्रीतिम् (prītim) - joy, pleasure, affection, love

(noun)

Accusative, feminine, singular of prīti

prīti - joy, pleasure, satisfaction, affection, love

From root 'prī' (to please, to gladden).

Root: prī (class 9)

कदाचित् (kadācit) - sometimes, at some time, occasionally

(indeclinable)

अनुशोचति (anuśocati) - grieves, laments, regrets

(verb)

3rd person , singular, active, present (laṭ) of anu-śuc

Prefix: anu

Root: śuc (class 1)