महाभारतः mahābhārataḥ - book-3, chapter-198, verse-62

वेदस्योपनिषत्सत्यं सत्यस्योपनिषद्दमः ।
दमस्योपनिषत्त्यागः शिष्टाचारेषु नित्यदा ॥६२॥

62. vedasyopaniṣatsatyaṁ satyasyopaniṣaddamaḥ ,
damasyopaniṣattyāgaḥ śiṣṭācāreṣu nityadā.

62. vedasya upaniṣat satyaṃ satyasya upaniṣat damaḥ
damasya upaniṣat tyāgaḥ śiṣṭācāreṣu nityadā

62. The essence of the Veda is truth (satya). The essence of truth (satya) is self-control (dama). The essence of self-control (dama) is renunciation (tyāga), always found within virtuous conduct (śiṣṭācāra).

Words meanings summery:

• वेदस्य (vedasya) - of the Veda, of sacred knowledge

• उपनिषत् (upaniṣat) - secret teaching, essence, principal doctrine

• सत्यं (satyaṁ) - truth, reality

• सत्यस्य (satyasya) - of truth

• उपनिषत् (upaniṣat) - secret teaching, essence

• दमः (damaḥ) - self-control, restraint

• दमस्य (damasya) - of self-control

• उपनिषत् (upaniṣat) - secret teaching, essence

• त्यागः (tyāgaḥ) - renunciation, abandonment, sacrifice

• शिष्टाचारेषु (śiṣṭācāreṣu) - among proper conduct, in virtuous behaviors

• नित्यदा (nityadā) - always, perpetually

Words meanings and morphology

वेदस्य (vedasya) - of the Veda, of sacred knowledge

(noun)

Genitive, masculine, singular of veda

veda - knowledge, sacred knowledge, Veda (scripture)

from root vid (to know)

Root: vid (class 2)

उपनिषत् (upaniṣat) - secret teaching, essence, principal doctrine

(noun)

Nominative, feminine, singular of upaniṣad

upaniṣad - secret teaching, mystic doctrine, essence, an Upanishad (philosophical text)

from upa-ni-sad (to sit near, sit down devotedly)

Prefixes: upa+ni

Root: sad (class 1)

सत्यं (satyaṁ) - truth, reality

(noun)

Nominative, neuter, singular of satya

satya - truth, reality, honesty, integrity, promise

from sat (being) + ya

Root: as (class 2)

सत्यस्य (satyasya) - of truth

(noun)

Genitive, neuter, singular of satya

satya - truth, reality, honesty

from sat (being) + ya

Root: as (class 2)

उपनिषत् (upaniṣat) - secret teaching, essence

(noun)

Nominative, feminine, singular of upaniṣad

upaniṣad - secret teaching, mystic doctrine, essence, an Upanishad (philosophical text)

from upa-ni-sad (to sit near, sit down devotedly)

Prefixes: upa+ni

Root: sad (class 1)

दमः (damaḥ) - self-control, restraint

(noun)

Nominative, masculine, singular of dama

dama - self-control, restraint, subjugation (of senses/passions)

from root dam (to tame, control)

Root: dam (class 4)

Note: Original word dama.

दमस्य (damasya) - of self-control

(noun)

Genitive, masculine, singular of dama

dama - self-control, restraint, subjugation (of senses/passions)

from root dam (to tame, control)

Root: dam (class 4)

उपनिषत् (upaniṣat) - secret teaching, essence

(noun)

Nominative, feminine, singular of upaniṣad

upaniṣad - secret teaching, mystic doctrine, essence, an Upanishad (philosophical text)

from upa-ni-sad (to sit near, sit down devotedly)

Prefixes: upa+ni

Root: sad (class 1)

त्यागः (tyāgaḥ) - renunciation, abandonment, sacrifice

(noun)

Nominative, masculine, singular of tyāga

tyāga - renunciation, abandonment, sacrifice, giving up

from root tyaj (to abandon, forsake)

Root: tyaj (class 1)

Note: Original word tyāga.

शिष्टाचारेषु (śiṣṭācāreṣu) - among proper conduct, in virtuous behaviors

(noun)

Locative, masculine, plural of śiṣṭācāra

śiṣṭācāra - proper conduct, virtuous behavior, customary law, tradition of the cultured

Compound type : tatpuruṣa (śiṣṭa+ācāra)

• śiṣṭa – taught, disciplined, cultured, virtuous
  adjective (masculine)
  Past Passive Participle
  derived from root śiṣ (to teach, discipline)
  Root: śiṣ (class 7)
• ācāra – conduct, behavior, custom, practice
  noun (masculine)
  derived from ā-car (to move, behave)
  Prefix: ā
  Root: car (class 1)

नित्यदा (nityadā) - always, perpetually

(indeclinable)

derived from nitya (constant, eternal) + suffix -dā (meaning 'at all times')