महाभारतः mahābhārataḥ - book-12, chapter-57, verse-4

तदेतन्नरशार्दूल हृदि त्वं कर्तुमर्हसि ।
संधेयानपि संधत्स्व विरोध्यांश्च विरोधय ॥४॥

4. tadetannaraśārdūla hṛdi tvaṁ kartumarhasi ,
saṁdheyānapi saṁdhatsva virodhyāṁśca virodhaya.

4. tat etat nara-śārdūla hṛdi tvam kartum arhasi
sandheyān api saṃdhatsva virodhyān ca virodhaya

4. nara-śārdūla tvam tat etat hṛdi kartum arhasi
sandheyān api saṃdhatsva ca virodhyān virodhaya

4. Therefore, O tiger among men, you should keep this in your heart. Make peace even with those who are suitable for treaties, and fight those who are hostile.

Words meanings summery:

• तत् (tat) - that

• एतत् (etat) - this

• नर-शार्दूल (nara-śārdūla) - O tiger among men, O foremost of men

• हृदि (hṛdi) - in the heart

• त्वम् (tvam) - you

• कर्तुम् (kartum) - to do, to make, to place

• अर्हसि (arhasi) - you are able, you ought, you should

• सन्धेयान् (sandheyān) - those who should be reconciled, fit for treaty

• अपि (api) - even, also

• संधत्स्व (saṁdhatsva) - make peace, ally with, join

• विरोध्यान् (virodhyān) - those who should be opposed, hostile ones

• च (ca) - and, also

• विरोधय (virodhaya) - fight, oppose, make hostile

Words meanings and morphology

तत् (tat) - that

(pronoun)

Nominative, neuter, singular of tad

tad - that, he, she, it

एतत् (etat) - this

(pronoun)

Nominative, neuter, singular of etas

etas - this

नर-शार्दूल (nara-śārdūla) - O tiger among men, O foremost of men

(noun)

Vocative, masculine, singular of nara-śārdūla

nara-śārdūla - tiger among men, foremost of men

Compound type : tatpuruṣa (nara+śārdūla)

• nara – man, person
  noun (masculine)
• śārdūla – tiger (often used to mean 'best' or 'foremost' in compounds)
  noun (masculine)

हृदि (hṛdi) - in the heart

(noun)

Locative, neuter, singular of hṛd

hṛd - heart, mind, breast

त्वम् (tvam) - you

(pronoun)

Nominative, masculine, singular of tvad

tvad - you

कर्तुम् (kartum) - to do, to make, to place

(indeclinable)

Infinitive

Infinitive form of root 'kṛ'

Root: kṛ (class 8)

अर्हसि (arhasi) - you are able, you ought, you should

(verb)

2nd person , singular, active, present (lat) of arh

Present (Parasmaipada)

Present 2nd person singular active

Root: arh (class 1)

सन्धेयान् (sandheyān) - those who should be reconciled, fit for treaty

(adjective)

Accusative, masculine, plural of sandheya

sandheya - to be joined, to be reconciled, fit for alliance/treaty

Gerundive

From root 'dhā' with prefix 'sam'

Prefix: sam

Root: dhā (class 3)

अपि (api) - even, also

(indeclinable)

संधत्स्व (saṁdhatsva) - make peace, ally with, join

(verb)

2nd person , singular, middle, imperative (loṭ) of sam-dhā

Imperative (Atmanepada)

Imperative 2nd person singular middle, from root 'dhā' with prefix 'sam'

Prefix: sam

Root: dhā (class 3)

विरोध्यान् (virodhyān) - those who should be opposed, hostile ones

(adjective)

Accusative, masculine, plural of virodhya

virodhya - to be opposed, hostile, an enemy

Gerundive

From root 'rudh' with prefix 'vi'

Prefix: vi

Root: rudh (class 7)

च (ca) - and, also

(indeclinable)

विरोधय (virodhaya) - fight, oppose, make hostile

(verb)

2nd person , singular, active, imperative (loṭ) of vi-rudh

Imperative (Causative Parasmaipada)

Imperative 2nd person singular active (causative), from root 'rudh' with prefix 'vi'

Prefix: vi

Root: rudh (class 7)

Note: Causative form implies 'cause to fight' or 'engage in battle with'.