महाभारतः mahābhārataḥ - book-5, chapter-47, verse-33

यदा विराटः परवीरघाती मर्मान्तरे शत्रुचमूं प्रवेष्टा ।
मत्स्यैः सार्धमनृशंसरूपैस्तदा युद्धं धार्तराष्ट्रोऽन्वतप्स्यत् ॥३३॥

33. yadā virāṭaḥ paravīraghātī; marmāntare śatrucamūṁ praveṣṭā ,
matsyaiḥ sārdhamanṛśaṁsarūpai;stadā yuddhaṁ dhārtarāṣṭro'nvatapsyat.

33. yadā virāṭaḥ paravīraghātī marmāntare
śatrucamūm praveṣṭā matsyaiḥ
sārdham anṛśaṃsarūpaiḥ tadā
yuddham dhārtarāṣṭraḥ anvatapsyat

33. When Virāṭa, the slayer of enemy heroes, will penetrate deep into the enemy army along with the ferocious Matsyas, then the son of Dhṛtarāṣṭra will regret the war.

Words meanings summery:

• यदा (yadā) - when

• विराटः (virāṭaḥ) - Virāṭa

• परवीरघाती (paravīraghātī) - slayer of enemy heroes

• मर्मान्तरे (marmāntare) - in the vital parts, in the vulnerable points

• शत्रुचमूम् (śatrucamūm) - into the enemy army

• प्रवेष्टा (praveṣṭā) - will enter, one who will enter

• मत्स्यैः (matsyaiḥ) - with the warriors of the Matsya kingdom (with the Matsyas)

• सार्धम् (sārdham) - together with, along with

• अनृशंसरूपैः (anṛśaṁsarūpaiḥ) - with merciless forms, with ferocious forms

• तदा (tadā) - then, at that time

• युद्धम् (yuddham) - battle, war

• धार्तराष्ट्रः (dhārtarāṣṭraḥ) - Duryodhana (son of Dhṛtarāṣṭra, i.e., Duryodhana)

• अन्वतप्स्यत् (anvatapsyat) - will regret, will grieve

Words meanings and morphology

यदा (yadā) - when

(indeclinable)

विराटः (virāṭaḥ) - Virāṭa

(proper noun)

Nominative, masculine, singular of virāṭa

virāṭa - Virāṭa (name of the king of Matsyas)

परवीरघाती (paravīraghātī) - slayer of enemy heroes

(adjective)

Nominative, masculine, singular of paravīraghātin

paravīraghātin - slayer of enemy heroes

agent noun

from ghātin (agent suffix -in) of paravīra

Compound type : tatpurusha (para+vīra+ghātin)

• para – other, enemy
  adjective (masculine)
• vīra – hero, brave man
  noun (masculine)
• ghātin – killer, slayer
  adjective (masculine)
  agent noun
  from root han
  Root: han (class 2)

Note: Agrees with Virāṭaḥ.

मर्मान्तरे (marmāntare) - in the vital parts, in the vulnerable points

(noun)

Locative, neuter, singular of marmāntara

marmāntara - vital part, vulnerable point, inner sensitive spot

Compound type : tatpurusha (marman+antara)

• marman – vital part, sensitive point
  noun (neuter)
• antara – interior, interval, inside
  noun (neuter)

Note: Location of action.

शत्रुचमूम् (śatrucamūm) - into the enemy army

(noun)

Accusative, feminine, singular of śatrucamū

śatrucamū - enemy army

Compound type : tatpurusha (śatru+camū)

• śatru – enemy
  noun (masculine)
• camū – army, host
  noun (feminine)

Note: Object of `praveṣṭā`.

प्रवेष्टा (praveṣṭā) - will enter, one who will enter

(adjective)

Nominative, masculine, singular of praveṣṭṛ

praveṣṭṛ - one who enters, will enter

agent noun from future stem

from root viś with prefix pra, tṛc suffix

Prefix: pra

Root: viś (class 6)

Note: Agrees with Virāṭaḥ.

मत्स्यैः (matsyaiḥ) - with the warriors of the Matsya kingdom (with the Matsyas)

(noun)

Instrumental, masculine, plural of matsya

matsya - fish, a member of the Matsya tribe/kingdom

Note: Used with `sārdham`.

सार्धम् (sārdham) - together with, along with

(indeclinable)

अनृशंसरूपैः (anṛśaṁsarūpaiḥ) - with merciless forms, with ferocious forms

(adjective)

Instrumental, masculine, plural of anṛśaṃsarūpa

anṛśaṁsarūpa - having a merciless or cruel form/nature, ferocious

Compound type : bahuvrīhi (a+nṛśaṃsa+rūpa)

• a – not, non-
  indeclinable
  negative prefix
• nṛśaṃsa – merciless, cruel, fierce
  adjective (masculine)
• rūpa – form, shape, appearance
  noun (neuter)

Note: Agrees with `matsyaiḥ`.

तदा (tadā) - then, at that time

(indeclinable)

युद्धम् (yuddham) - battle, war

(noun)

Accusative, neuter, singular of yuddha

yuddha - battle, fight, war

Note: Object of regret.

धार्तराष्ट्रः (dhārtarāṣṭraḥ) - Duryodhana (son of Dhṛtarāṣṭra, i.e., Duryodhana)

(proper noun)

Nominative, masculine, singular of dhārtarāṣṭra

dhārtarāṣṭra - descendant of Dhṛtarāṣṭra, son of Dhṛtarāṣṭra

from Dhṛtarāṣṭra (patronymic)

Note: Subject of the verb `anvatapsyat`.

अन्वतप्स्यत् (anvatapsyat) - will regret, will grieve

(verb)

3rd person , singular, active, conditional past (lṛṅ) of anutap

Conditional Past

from root tap with prefix anu, Lṛṅ

Prefix: anu

Root: tap (class 1)