महाभारतः mahābhārataḥ - book-2, chapter-66, verse-8

सर्वोपायैर्निहन्तव्याः शत्रवः शत्रुकर्षण ।
पुरा युद्धाद्बलाद्वापि प्रकुर्वन्ति तवाहितम् ॥८॥

8. sarvopāyairnihantavyāḥ śatravaḥ śatrukarṣaṇa ,
purā yuddhādbalādvāpi prakurvanti tavāhitam.

8. sarva-upāyaiḥ nihantavyāḥ śatravaḥ śatrukarṣaṇa
purā yuddhāt balāt vā api prakurvanti tava ahitam

8. O chastiser of enemies, foes should be eliminated by all means before they cause you harm, whether through war or by force.

Words meanings summery:

• सर्व-उपायैः (sarva-upāyaiḥ) - by all possible methods or strategies (by all means, by all expedients)

• निहन्तव्याः (nihantavyāḥ) - must be eliminated (should be killed, ought to be destroyed)

• शत्रवः (śatravaḥ) - foes (enemies, foes)

• शत्रुकर्षण (śatrukarṣaṇa) - O chastiser of enemies (O tormentor of foes, O subduer of enemies)

• पुरा (purā) - before (before, formerly, in front)

• युद्धात् (yuddhāt) - through war (from war, because of fighting)

• बलात् (balāt) - by force (from force, by force, because of power)

• वा (vā) - or (or, either)

• अपि (api) - even (even, also, too)

• प्रकुर्वन्ति (prakurvanti) - they cause (they do, they perform, they cause)

• तव (tava) - your (your, of you)

• अहितम् (ahitam) - harm (harm, disadvantage, evil)

Words meanings and morphology

सर्व-उपायैः (sarva-upāyaiḥ) - by all possible methods or strategies (by all means, by all expedients)

(noun)

Instrumental, masculine, plural of sarvopāya

sarvopāya - all means, all expedients, every remedy

Compound type : karmadhāraya (sarva+upāya)

• sarva – all, every, whole
  pronoun (masculine)
• upāya – means, expedient, method, way, resource
  noun (masculine)
  from upa-i (to go near)
  Prefix: upa
  Root: i (class 2)

निहन्तव्याः (nihantavyāḥ) - must be eliminated (should be killed, ought to be destroyed)

(adjective)

Nominative, masculine, plural of nihantavya

nihantavya - that which should be killed or destroyed

Gerundive

Gerundive from root han with prefix ni-

Prefix: ni

Root: han (class 2)

शत्रवः (śatravaḥ) - foes (enemies, foes)

(noun)

Nominative, masculine, plural of śatru

śatru - enemy, foe, rival

Root: śad

शत्रुकर्षण (śatrukarṣaṇa) - O chastiser of enemies (O tormentor of foes, O subduer of enemies)

(noun)

Vocative, masculine, singular of śatrukarṣaṇa

śatrukarṣaṇa - tormentor of foes, subduer of enemies

Compound type : tatpuruṣa (śatru+karṣaṇa)

• śatru – enemy, foe, rival
  noun (masculine)
  Root: śad
• karṣaṇa – drawing, dragging, tormenting, subduing
  noun (masculine)
  from root kṛṣ (to draw, pull, torment)
  Root: kṛṣ (class 1)

पुरा (purā) - before (before, formerly, in front)

(indeclinable)

युद्धात् (yuddhāt) - through war (from war, because of fighting)

(noun)

Ablative, neuter, singular of yuddha

yuddha - war, battle, fight

Past Passive Participle

PPP from root yudh used as noun

Root: yudh (class 4)

बलात् (balāt) - by force (from force, by force, because of power)

(noun)

Ablative, neuter, singular of bala

bala - strength, power, force, army

वा (vā) - or (or, either)

(indeclinable)

अपि (api) - even (even, also, too)

(indeclinable)

प्रकुर्वन्ति (prakurvanti) - they cause (they do, they perform, they cause)

(verb)

3rd person , plural, active, present (laṭ) of kṛ

Present tense, 3rd plural, active voice

Prefix: pra

Root: kṛ (class 8)

तव (tava) - your (your, of you)

(pronoun)

Genitive, singular of yuṣmad

yuṣmad - you (pronoun)

अहितम् (ahitam) - harm (harm, disadvantage, evil)

(noun)

Accusative, neuter, singular of ahita

ahita - harm, disadvantage, evil, foe; not good, unfriendly

Past Passive Participle

Compound of a (negation) and hita (Past Passive Participle of dhā with hi prefix).

Compound type : nañ-tatpuruṣa (a+hita)

• a – not, non-
  indeclinable
  negating prefix
• hita – placed, arranged, good, beneficial, suitable
  adjective (neuter)
  Past Passive Participle
  PPP of root dhā (to place, put)
  Root: dhā (class 3)