महाभारतः mahābhārataḥ - book-12, chapter-187, verse-19

त्वचा स्पृशति च स्पर्शान्बुद्धिर्विक्रियतेऽसकृत् ।
येन संकल्पयत्यर्थं किंचिद्भवति तन्मनः ॥१९॥

19. tvacā spṛśati ca sparśānbuddhirvikriyate'sakṛt ,
yena saṁkalpayatyarthaṁ kiṁcidbhavati tanmanaḥ.

19. tvacā spṛśati ca sparśān buddhiḥ vikriyate asakṛt
yena saṅkalpayati artham kiñcit bhavati tat manaḥ

19. त्वचा स्पर्शान् च स्पृशतिबुद्धिः असकृत् विक्रियतेयेन [पुरुषः] किञ्चित् अर्थम् सङ्कल्पयति,
तत् मनः भवति।

19. One perceives objects of touch by the skin. The intellect (buddhi) is repeatedly modified (by these perceptions). That by which one conceptualizes any object is the mind (manas).

Words meanings summery:

• त्वचा (tvacā) - the skin as the instrument for touch perception (by the skin, with the skin)

• स्पृशति (spṛśati) - the act of tactile perception (one touches, he touches, perceives by touch)

• च (ca) - connects the perception by skin with the objects of touch (and, also)

• स्पर्शान् (sparśān) - the tactile sensations perceived by the skin (touches, contacts, objects of touch, sensations)

• बुद्धिः (buddhiḥ) - the faculty of decisive understanding and judgment (buddhi) which processes sensory data (intellect, understanding, discernment, reason)

• विक्रियते (vikriyate) - the intellect undergoes changes or modifications due to sensory input (is modified, is transformed, undergoes change, is affected)

• असकृत् (asakṛt) - emphasizes the continuous and frequent modification of the intellect (repeatedly, often, not once)

• येन (yena) - refers to the instrument (the mind) for conceptualization (by which, with which, whereby)

• सङ्कल्पयति (saṅkalpayati) - the mental function of forming intentions or ideas about objects (one wills, resolves, intends, conceptualizes, forms an idea)

• अर्थम् (artham) - any sensory or conceptual object of thought (object, purpose, meaning, thing)

• किञ्चित् (kiñcit) - any particular object or idea whatsoever (something, anything, a little)

• भवति (bhavati) - serves as the copula, 'that is the mind' (becomes, exists, happens)

• तत् (tat) - refers back to 'yena' (that by which...) (that, it)

• मनः (manaḥ) - the faculty of deliberation and conceptualization (manas) (mind, intellect, thought, intention)

Words meanings and morphology

त्वचा (tvacā) - the skin as the instrument for touch perception (by the skin, with the skin)

(noun)

Instrumental, feminine, singular of tvac

tvac - skin, hide, bark, rind

स्पृशति (spṛśati) - the act of tactile perception (one touches, he touches, perceives by touch)

(verb)

3rd person , singular, active, present (laṭ) of spṛś

From √spṛś (6th class, parasmaipada)

Root: spṛś (class 6)

च (ca) - connects the perception by skin with the objects of touch (and, also)

(indeclinable)

स्पर्शान् (sparśān) - the tactile sensations perceived by the skin (touches, contacts, objects of touch, sensations)

(noun)

Accusative, masculine, plural of sparśa

sparśa - touch, contact, sensation, object of touch

From √spṛś 'to touch'

Root: spṛś (class 6)

बुद्धिः (buddhiḥ) - the faculty of decisive understanding and judgment (buddhi) which processes sensory data (intellect, understanding, discernment, reason)

(noun)

Nominative, feminine, singular of buddhi

buddhi - intellect, understanding, perception, judgment, reason

From √budh 'to wake, to know'

Root: budh (class 1)

विक्रियते (vikriyate) - the intellect undergoes changes or modifications due to sensory input (is modified, is transformed, undergoes change, is affected)

(verb)

3rd person , singular, passive/middle, present (laṭ) of vikṛ

From vi- + √kṛ (8th class, passive, ātmanepada)

Prefix: vi

Root: kṛ (class 8)

असकृत् (asakṛt) - emphasizes the continuous and frequent modification of the intellect (repeatedly, often, not once)

(indeclinable)

From a- (negation) + sakṛt (once)

येन (yena) - refers to the instrument (the mind) for conceptualization (by which, with which, whereby)

(pronoun)

Instrumental, neuter, singular of yad

yad - which, what, that

Note: Could also be masculine instrumental singular.

सङ्कल्पयति (saṅkalpayati) - the mental function of forming intentions or ideas about objects (one wills, resolves, intends, conceptualizes, forms an idea)

(verb)

3rd person , singular, active, present (laṭ) of saṅkalp

From sam- + √kḷp (10th class, parasmaipada)

Prefix: sam

Root: kḷp (class 10)

अर्थम् (artham) - any sensory or conceptual object of thought (object, purpose, meaning, thing)

(noun)

Accusative, masculine, singular of artha

artha - object, purpose, meaning, wealth, thing

किञ्चित् (kiñcit) - any particular object or idea whatsoever (something, anything, a little)

(pronoun)

Nominative, neuter, singular of kiñcid

kiñcid - something, anything, a little, whatsoever

Indeclinable/Adverbial use from 'kim' + 'cit'

भवति (bhavati) - serves as the copula, 'that is the mind' (becomes, exists, happens)

(verb)

3rd person , singular, active, present (laṭ) of bhū

From √bhū (1st class, parasmaipada)

Root: bhū (class 1)

तत् (tat) - refers back to 'yena' (that by which...) (that, it)

(pronoun)

Nominative, neuter, singular of tad

tad - that, he, she, it

मनः (manaḥ) - the faculty of deliberation and conceptualization (manas) (mind, intellect, thought, intention)

(noun)

Nominative, neuter, singular of manas

manas - mind, intellect, thought, intention, heart

From √man 'to think'

Root: man (class 4)