महाभारतः mahābhārataḥ - book-5, chapter-70, verse-66

अथ वा मूलघातेन द्विषतां मधुसूदन ।
फलनिर्वृत्तिरिद्धा स्यात्तन्नृशंसतरं भवेत् ॥६६॥

66. atha vā mūlaghātena dviṣatāṁ madhusūdana ,
phalanirvṛttiriddhā syāttannṛśaṁsataraṁ bhavet.

66. atha vā mūlaghātena dviṣatām madhusūdana |
phalanivṛttiḥ ṛddhā syāt tat nṛśaṃsataram bhavet

66. Or else, O Madhusūdana, by completely destroying the enemies, the desired outcome might be abundantly achieved. However, that would be more cruel.

Words meanings summery:

• अथ (atha) - used with vā to mean 'or else' (now, then, moreover, or else)

• वा (vā) - or

• मूलघातेन (mūlaghātena) - by completely destroying (the enemies) (by uprooting, by destroying the root)

• द्विषताम् (dviṣatām) - of enemies, of those hating

• मधुसूदन (madhusūdana) - O Madhusūdana (slayer of the demon Madhu, a name of Viṣṇu/Kṛṣṇa)

• फलनिवृत्तिः (phalanivṛttiḥ) - accomplishment of results, desired outcome, fruition

• ऋद्धा (ṛddhā) - abundantly achieved or complete (prosperous, abundant, accomplished, complete)

• स्यात् (syāt) - might be, would be, should be

• तत् (tat) - that (action) (that, it)

• नृशंसतरम् (nṛśaṁsataram) - more cruel, more brutal

• भवेत् (bhavet) - might be, would be, should be

Words meanings and morphology

अथ (atha) - used with vā to mean 'or else' (now, then, moreover, or else)

(indeclinable)

वा (vā) - or

(indeclinable)

मूलघातेन (mūlaghātena) - by completely destroying (the enemies) (by uprooting, by destroying the root)

(noun)

Instrumental, masculine, singular of mūlaghāta

mūlaghāta - uprooting, destruction of the root, complete destruction

Compound type : tatpuruṣa (mūla+ghāta)

• mūla – root, origin, foundation
  noun (neuter)
• ghāta – killing, destruction, striking
  noun (masculine)
  Derived from root han 'to strike, kill' with suffix -a.
  Root: han (class 2)

द्विषताम् (dviṣatām) - of enemies, of those hating

(participle)

Genitive, masculine, plural of dviṣat

dviṣat - hating, hostile, enemy

present active participle

Derived from root dviṣ 'to hate'.

Root: dviṣ (class 2)

मधुसूदन (madhusūdana) - O Madhusūdana (slayer of the demon Madhu, a name of Viṣṇu/Kṛṣṇa)

(proper noun)

Vocative, masculine, singular of madhusūdana

madhusūdana - Madhusūdana (slayer of the demon Madhu; a name of Viṣṇu/Kṛṣṇa)

Compound type : tatpuruṣa (madhu+sūdana)

• madhu – honey, sweet, a demon
  noun (masculine)
• sūdana – slayer, destroyer
  noun (masculine)
  agent noun
  Derived from root sūd 'to destroy, kill'.
  Root: sūd (class 1)

फलनिवृत्तिः (phalanivṛttiḥ) - accomplishment of results, desired outcome, fruition

(noun)

Nominative, feminine, singular of phalanivṛtti

phalanivṛtti - accomplishment of results, desired outcome, fruition

Compound type : tatpuruṣa (phala+nivṛtti)

• phala – fruit, result, outcome, reward
  noun (neuter)
• nivṛtti – cessation, accomplishment, completion
  noun (feminine)
  Derived from ni-vṛt.
  Prefix: ni
  Root: vṛt (class 1)

ऋद्धा (ṛddhā) - abundantly achieved or complete (prosperous, abundant, accomplished, complete)

(adjective)

Nominative, feminine, singular of ṛddha

ṛddha - prosperous, abundant, accomplished, rich, thriving

Past Passive Participle

Derived from root ṛdh 'to thrive, prosper'.

Root: ṛdh (class 4)

Note: Qualifies phalanivṛttiḥ.

स्यात् (syāt) - might be, would be, should be

(verb)

3rd person , singular, active, optative (liṅ) of as

optative

2nd class, Parasmaipada

Root: as (class 2)

तत् (tat) - that (action) (that, it)

(pronoun)

Nominative, neuter, singular of tad

tad - that, he, she, it

Note: Refers to the act of destroying enemies.

नृशंसतरम् (nṛśaṁsataram) - more cruel, more brutal

(adjective)

Nominative, neuter, singular of nṛśaṃsatara

nṛśaṁsatara - more cruel, more brutal, more ferocious

Comparative degree of nṛśaṃsa ('cruel').

Note: Also accusative singular neuter.

भवेत् (bhavet) - might be, would be, should be

(verb)

3rd person , singular, active, optative (liṅ) of bhū

optative

1st class, Parasmaipada

Root: bhū (class 1)