योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-187, verse-65

शब्दं येन प्रदेशेन वेत्ति श्रोत्रं तदुच्यते ।
स्पर्शं येन प्रदेशेन वेत्ति तत्तु त्वगिन्द्रियम् ॥ ६५ ॥

śabdaṃ yena pradeśena vetti śrotraṃ taducyate ,
sparśaṃ yena pradeśena vetti tattu tvagindriyam 65

65. śabdam yena pradeśena vetti śrotram tat ucyate
sparśam yena pradeśena vetti tat tu tvagindriyam

65. yena pradeśena śrotram śabdam vetti tat ucyate
yena pradeśena tvagindriyam sparśam vetti tat tu

65. That faculty by which the ear perceives sound is called the sense of hearing. And that by which the tactile sense perceives touch is indeed the sense of touch.

Words meanings summery:

• शब्दम् (śabdam) - Sound (as an object of perception). (Sound, word.)

• येन (yena) - By which (sense organ). (By which, by whom.)

• प्रदेशेन (pradeśena) - By the faculty, by the particular sense organ. (By the region, by the part, by the specific place or faculty.)

• वेत्ति (vetti) - Perceives (sensory information). (Knows, perceives, understands.)

• श्रोत्रम् (śrotram) - The sense of hearing. (The ear, the sense of hearing.)

• तत् (tat) - That (faculty of hearing). (That.)

• उच्यते (ucyate) - Is called. (Is said, is called.)

• स्पर्शम् (sparśam) - The sensation of touch (as an object of perception). (Touch, contact.)

• येन (yena) - By which (sense organ). (By which, by whom.)

• प्रदेशेन (pradeśena) - By the faculty, by the particular sense organ. (By the region, by the part, by the specific place or faculty.)

• वेत्ति (vetti) - Perceives (sensory information). (Knows, perceives, understands.)

• तत् (tat) - That (sense of touch). (That.)

• तु (tu) - Indeed, certainly. (But, indeed, certainly, on the other hand.)

• त्वगिन्द्रियम् (tvagindriyam) - The sense of touch. (The sense of touch, the skin as a sense organ.)

Words meanings and morphology

शब्दम् (śabdam) - Sound (as an object of perception). (Sound, word.)

(noun)

Accusative, masculine, singular of śabda

śabda - Sound, noise, word, speech.

Note: Object of `vetti`.

येन (yena) - By which (sense organ). (By which, by whom.)

(pronoun)

Instrumental, masculine, singular of yad

yad - Which, what.

Relative pronoun.

Note: Refers to `pradeśena`.

प्रदेशेन (pradeśena) - By the faculty, by the particular sense organ. (By the region, by the part, by the specific place or faculty.)

(noun)

Instrumental, masculine, singular of pradeśa

pradeśa - Region, place, part, faculty.

From `pra-` (prefix) + `√diś` (to point, show).

Prefix: pra

Root: diś (class 6)

वेत्ति (vetti) - Perceives (sensory information). (Knows, perceives, understands.)

(verb)

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

Root `√vid` (class 2).

Root: vid (class 2)

Note: Subject for first part is `śrotram`, for second part `tvagindriyam`.

श्रोत्रम् (śrotram) - The sense of hearing. (The ear, the sense of hearing.)

(noun)

Nominative, neuter, singular of śrotra

śrotra - Ear, organ of hearing, the Vedas (as heard tradition).

From `√śru` (to hear).

Root: śru (class 5)

तत् (tat) - That (faculty of hearing). (That.)

(pronoun)

Nominative, neuter, singular of tad

tad - That, it.

Demonstrative pronoun.

Note: Subject of `ucyate`.

उच्यते (ucyate) - Is called. (Is said, is called.)

(verb)

3rd person , singular, passive, present (laṭ) of vac

Root `√vac` (class 2).

Root: vac (class 2)

स्पर्शम् (sparśam) - The sensation of touch (as an object of perception). (Touch, contact.)

(noun)

Accusative, masculine, singular of sparśa

sparśa - Touch, contact, sensation.

From `√spṛś` (to touch).

Root: spṛś (class 6)

Note: Object of `vetti`.

येन (yena) - By which (sense organ). (By which, by whom.)

(pronoun)

Instrumental, masculine, singular of yad

yad - Which, what.

Relative pronoun.

Note: Refers to `pradeśena`.

प्रदेशेन (pradeśena) - By the faculty, by the particular sense organ. (By the region, by the part, by the specific place or faculty.)

(noun)

Instrumental, masculine, singular of pradeśa

pradeśa - Region, place, part, faculty.

From `pra-` (prefix) + `√diś` (to point, show).

Prefix: pra

Root: diś (class 6)

वेत्ति (vetti) - Perceives (sensory information). (Knows, perceives, understands.)

(verb)

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

Root `√vid` (class 2).

Root: vid (class 2)

Note: Subject for first part is `śrotram`, for second part `tvagindriyam`.

तत् (tat) - That (sense of touch). (That.)

(pronoun)

Nominative, neuter, singular of tad

tad - That, it.

Demonstrative pronoun.

Note: Appositive to `tvagindriyam`.

तु (tu) - Indeed, certainly. (But, indeed, certainly, on the other hand.)

(indeclinable)

Particle used for emphasis or contrast.

त्वगिन्द्रियम् (tvagindriyam) - The sense of touch. (The sense of touch, the skin as a sense organ.)

(noun)

Nominative, neuter, singular of tvagindriya

tvagindriya - Sense of touch, skin (as a sense organ).

Compound of `tvac` (skin) and `indriya` (sense organ).

Compound type : tatpurusha (tvac+indriya)

• tvac – skin, hide, bark
  noun (feminine)
• indriya – sense organ, faculty, power
  noun (neuter)
  From `indra` (Indra) + `ya` (suffix), referring to what belongs to or is wielded by Indra, hence power or faculty.

Note: Subject of `vetti` (implied).