महाभारतः mahābhārataḥ - book-12, chapter-139, verse-94

तस्मात्कौन्तेय विदुषा धर्माधर्मविनिश्चये ।
बुद्धिमास्थाय लोकेऽस्मिन्वर्तितव्यं यतात्मना ॥९४॥

94. tasmātkaunteya viduṣā dharmādharmaviniścaye ,
buddhimāsthāya loke'sminvartitavyaṁ yatātmanā.

94. tasmāt kaunteya viduṣā dharmādharmaviniścaye
buddhim āsthāya loke asmin vartitavyam yatātmanā

94. tasmāt kaunteya asmin loke viduṣā yatātmanā
dharmādharmaviniścaye buddhim āsthāya vartitavyam

94. Therefore, O Kaunteya, a wise person should live in this world with self-control (yatātmanā), adopting clear understanding in determining what is righteous (dharma) and unrighteous (adharma).

Words meanings summery:

• तस्मात् (tasmāt) - therefore, from that

• कौन्तेय (kaunteya) - Refers to Arjuna. (O son of Kunti)

• विदुषा (viduṣā) - by a wise person, by one who knows

• धर्माधर्मविनिश्चये (dharmādharmaviniścaye) - in the discrimination of right and wrong, in deciding dharma and adharma

• बुद्धिम् (buddhim) - understanding, intellect, wisdom

• आस्थाय (āsthāya) - having resorted to, having adopted, having taken one's stand upon

• लोके (loke) - in the world

• अस्मिन् (asmin) - in this (masculine, locative)

• वर्तितव्यम् (vartitavyam) - one should act, one should behave, to be lived

• यतात्मना (yatātmanā) - by one who has controlled oneself, by a disciplined person

Words meanings and morphology

तस्मात् (tasmāt) - therefore, from that

(indeclinable)

Ablative singular of tad.

कौन्तेय (kaunteya) - Refers to Arjuna. (O son of Kunti)

(proper noun)

Vocative, masculine, singular of kaunteya

kaunteya - son of Kunti (an epithet for Arjuna and his brothers)

Formed with suffix eya indicating 'descendant of Kunti'.

विदुषा (viduṣā) - by a wise person, by one who knows

(adjective)

Instrumental, masculine, singular of vidvas

vidvas - knowing, learned, wise; a learned person, a scholar

Present Active Participle

From root √vid (to know). Declension of vidvas.

Root: vid (class 2)

Note: Participle used as a noun.

धर्माधर्मविनिश्चये (dharmādharmaviniścaye) - in the discrimination of right and wrong, in deciding dharma and adharma

(noun)

Locative, masculine, singular of dharmādharmaviniścaya

dharmādharmaviniścaya - decision/discrimination between right and wrong (dharma and adharma)

Compound of dharma-adharma (dvandva) and viniścaya (tatpuruṣa).

Compound type : dvandva (dharma+adharma+viniścaya)

• dharma – constitution, natural law, intrinsic nature, righteousness, duty (dharma)
  noun (masculine)
  From root √dhṛ (to support).
  Root: dhṛ (class 1)
• adharma – unrighteousness, injustice, vice, wrong (adharma)
  noun (masculine)
  Negative prefix a + dharma.
  Prefix: a
  Root: dhṛ (class 1)
• viniścaya – ascertainment, determination, discrimination, decision
  noun (masculine)
  From root √ci (to collect) with prefixes vi and ni.
  Prefixes: vi+ni
  Root: ci (class 5)

बुद्धिम् (buddhim) - understanding, intellect, wisdom

(noun)

Accusative, feminine, singular of buddhi

buddhi - intelligence, understanding, perception, intellect

From root √budh (to know, perceive).

Root: budh (class 1)

Note: Object of āsthāya.

आस्थाय (āsthāya) - having resorted to, having adopted, having taken one's stand upon

(indeclinable)

Absolutive (gerund)

From root √sthā (to stand) with prefix ā, suffix ya.

Prefix: ā

Root: sthā (class 1)

लोके (loke) - in the world

(noun)

Locative, masculine, singular of loka

loka - world, realm, people, common practice

From root √lok (to see, perceive).

Root: lok (class 1)

अस्मिन् (asmin) - in this (masculine, locative)

(pronoun)

Locative, masculine, singular of etad

etad - this, that

Locative singular of etad.

वर्तितव्यम् (vartitavyam) - one should act, one should behave, to be lived

(adjective)

Nominative, neuter, singular of vartitavya

vartitavya - to be done, to be acted, to be observed; duty, conduct

Gerundive

From root √vṛt (to turn, to exist, to act) with suffix tavya. Used impersonally.

Root: vṛt (class 1)

Note: Predicate nominative, implies "it is to be acted".

यतात्मना (yatātmanā) - by one who has controlled oneself, by a disciplined person

(adjective)

Instrumental, masculine, singular of yatātman

yatātman - one who has controlled one's self, self-controlled, disciplined

Compound of yata (controlled) and ātman (self).

Compound type : bahuvrīhi (yata+ātman)

• yata – controlled, restrained, disciplined
  adjective (masculine)
  Past Passive Participle
  From root √yam (to restrain).
  Root: yam (class 1)
• ātman – self, soul, spirit, essence (ātman)
  noun (masculine)
  Root: an (class 2)