योगवासिष्ठः yogavāsiṣṭhaḥ - book-1, chapter-26, verse-18

मतिर्मान्द्येन मलिना पातैकपरमं वपुः ।
ज्वलतीव जरा देहे प्रतिस्फुरति दुष्कृतम् ॥ १८ ॥

matirmāndyena malinā pātaikaparamaṃ vapuḥ ,
jvalatīva jarā dehe pratisphurati duṣkṛtam 18

18. matiḥ māndyena malinā pātaikaparamaṁ vapuḥ
jvalati iva jarā dehe pratisphurati duṣkṛtam

18. matiḥ māndyena malinā vapuḥ pātaikaparamaṁ
jarā dehe iva jvalati duṣkṛtam pratisphurati

18. The intellect becomes sullied by sluggishness, and the body is primarily destined for decline. Old age burns, as it were, in the body, and past misdeeds manifest themselves.

Words meanings summery:

• मतिः (matiḥ) - intellect (mind, intellect, thought, intention)

• मान्द्येन (māndyena) - by sluggishness (by dullness, by sluggishness, by slowness)

• मलिना (malinā) - sullied (dirty, sullied, clouded, impure)

• पातैकपरमं (pātaikaparamaṁ) - primarily destined for decline (solely intent on falling, primarily destined for decline)

• वपुः (vapuḥ) - body, form, figure

• ज्वलति (jvalati) - burns (burns, shines)

• इव (iva) - as it were (as if, like, as, in a manner)

• जरा (jarā) - old age (old age, decay)

• देहे (dehe) - in the body

• प्रतिस्फुरति (pratisphurati) - manifests themselves (flashes forth, manifests, throbs)

• दुष्कृतम् (duṣkṛtam) - misdeeds (misdeed, evil deed, sin)

Words meanings and morphology

मतिः (matiḥ) - intellect (mind, intellect, thought, intention)

(noun)

Nominative, feminine, singular of mati

mati - mind, intellect, thought, intention, opinion

From root man (to think) with suffix -ti

Root: man (class 4)

मान्द्येन (māndyena) - by sluggishness (by dullness, by sluggishness, by slowness)

(noun)

Instrumental, neuter, singular of māndya

māndya - dullness, sluggishness, slowness, feebleness

From manda (dull, slow) + -ya (suffix for abstract noun)

मलिना (malinā) - sullied (dirty, sullied, clouded, impure)

(adjective)

Nominative, feminine, singular of malina

malina - dirty, impure, stained, sullied, dark

पातैकपरमं (pātaikaparamaṁ) - primarily destined for decline (solely intent on falling, primarily destined for decline)

(adjective)

Nominative, neuter, singular of pātaikaparama

pātaikaparama - solely devoted to falling, having falling as the sole aim, primarily intent on decline

Compound of pāta (falling/decline), eka (sole), and parama (supreme, ultimate aim)

Compound type : Bahuvrīhi (pāta+eka+parama)

• pāta – fall, falling, descent, decline, ruin
  noun (masculine)
  From root pat (to fall)
  Root: pat (class 1)
• eka – one, sole, single, alone
  adjective (masculine)
• parama – supreme, highest, chief, ultimate, most intent on
  adjective (masculine)

वपुः (vapuḥ) - body, form, figure

(noun)

Nominative, neuter, singular of vapus

vapus - body, form, figure, shape

From root vap (to strew, scatter, throw, produce)

Root: vap (class 1)

ज्वलति (jvalati) - burns (burns, shines)

(verb)

3rd person , singular, active, present (lat) of jvalati

Present active 3rd singular of root jval

Root: jval (class 1)

इव (iva) - as it were (as if, like, as, in a manner)

(indeclinable)

जरा (jarā) - old age (old age, decay)

(noun)

Nominative, feminine, singular of jarā

jarā - old age, decay, decrepitude

From root jṝ (to decay, grow old)

Root: jṝ (class 9)

देहे (dehe) - in the body

(noun)

Locative, masculine, singular of deha

deha - body, corporeal form

From root dih (to smear, form)

Root: dih (class 4)

प्रतिस्फुरति (pratisphurati) - manifests themselves (flashes forth, manifests, throbs)

(verb)

3rd person , singular, active, present (lat) of pratisphurati

Present active 3rd singular of root sphur with prefix prati

Prefix: prati

Root: sphur (class 6)

दुष्कृतम् (duṣkṛtam) - misdeeds (misdeed, evil deed, sin)

(noun)

Nominative, neuter, singular of duṣkṛta

duṣkṛta - misdeed, evil deed, sin, ill-done

Past Passive Participle (when used as adjective)

Compound of dus (bad) and kṛta (done)

Compound type : Tatpuruṣa (dus+kṛta)

• dus – bad, ill, difficult, hard
  indeclinable
  Prefix indicating badness or difficulty
• kṛta – done, made, performed, deed, act
  adjective (masculine)
  Past Passive Participle
  From root kṛ (to do, make)
  Root: kṛ (class 8)