महाभारतः mahābhārataḥ - book-10, chapter-15, verse-3

संहृते परमास्त्रेऽस्मिन्सर्वानस्मानशेषतः ।
पापकर्मा ध्रुवं द्रौणिः प्रधक्ष्यत्यस्त्रतेजसा ॥३॥

3. saṁhṛte paramāstre'sminsarvānasmānaśeṣataḥ ,
pāpakarmā dhruvaṁ drauṇiḥ pradhakṣyatyastratejasā.

3. saṃhṛte paramāstre asmin sarvān asmān aśeṣataḥ
pāpakarmā dhruvaṃ Drauṇiḥ pradhakṣyati astratejasā

3. pāpakarmā Drauṇiḥ asmin paramāstre saṃhṛte sarvān
asmān aśeṣataḥ astratejasā dhruvaṃ pradhakṣyati

3. When this supreme weapon is withdrawn, the sinful Drauni, whose actions (karma) are evil, will surely burn all of us completely with the weapon's potent energy.

Words meanings summery:

• संहृते (saṁhṛte) - when [it] has been withdrawn (when withdrawn, collected, retracted; having been withdrawn)

• परमास्त्रे (paramāstre) - in this supreme weapon (in the supreme weapon, concerning the highest missile)

• अस्मिन् (asmin) - in this [weapon] (in this, on this)

• सर्वान् (sarvān) - all of us (all, everyone)

• अस्मान् (asmān) - us [Pandavas and allies] (us, ourselves)

• अशेषतः (aśeṣataḥ) - completely, leaving no one behind (entirely, completely, without remainder)

• पापकर्मा (pāpakarmā) - Drauni, who performs sinful deeds (one whose actions are sinful, sinful doer)

• ध्रुवं (dhruvaṁ) - surely (certainly, surely, undoubtedly)

• द्रौणिः (drauṇiḥ) - Aśvatthāman, the son of Droṇa (Drauni (son of Drona))

• प्रधक्ष्यति (pradhakṣyati) - will completely destroy by fire (will burn completely, will consume)

• अस्त्रतेजसा (astratejasā) - by the potent energy of the supreme weapon (by the power of the weapon, with the energy of the missile)

Words meanings and morphology

संहृते (saṁhṛte) - when [it] has been withdrawn (when withdrawn, collected, retracted; having been withdrawn)

(adjective)

Locative, neuter, singular of saṃhṛta

saṁhṛta - withdrawn, collected, restrained, destroyed

Past Passive Participle

Derived from root hṛ (to seize, carry) with prefix saṃ, forms participle saṃhṛta.

Prefix: sam

Root: hṛ (class 1)

Note: Qualifies paramāstre.

परमास्त्रे (paramāstre) - in this supreme weapon (in the supreme weapon, concerning the highest missile)

(noun)

Locative, neuter, singular of paramāstra

paramāstra - supreme weapon, ultimate missile

Compound of parama (supreme) and astra (weapon).

Compound type : karmadhāraya (parama+astra)

• parama – supreme, highest, ultimate, excellent
  adjective (masculine)
  Superlative form of pra.
• astra – weapon, missile, projectile
  noun (neuter)
  Derived from root as (to throw).
  Root: as (class 4)

अस्मिन् (asmin) - in this [weapon] (in this, on this)

(pronoun)

Locative, neuter, singular of idam

idam - this, that

Demonstrative pronoun.

Note: Refers to paramāstra.

सर्वान् (sarvān) - all of us (all, everyone)

(adjective)

Accusative, masculine, plural of sarva

sarva - all, every, whole, complete

Pronominal adjective.

Note: Qualifies asmān.

अस्मान् (asmān) - us [Pandavas and allies] (us, ourselves)

(pronoun)

Accusative, plural of asmad

asmad - I, we

First person pronoun.

Note: Object of pradhakṣyati.

अशेषतः (aśeṣataḥ) - completely, leaving no one behind (entirely, completely, without remainder)

(indeclinable)

Formed with suffix -tas from aśeṣa (without remainder).

Note: Adverb modifying pradhakṣyati.

पापकर्मा (pāpakarmā) - Drauni, who performs sinful deeds (one whose actions are sinful, sinful doer)

(adjective)

Nominative, masculine, singular of pāpakarmā

pāpakarmā - one who performs evil deeds, sinful in action

Bahuvrīhi compound.

Compound type : bahuvrīhi (pāpa+karman)

• pāpa – sin, evil, wicked
  noun (neuter)
• karman – action, deed, work, ritual (karma)
  noun (neuter)
  Root: kṛ (class 8)

Note: Qualifies Drauṇiḥ.

ध्रुवं (dhruvaṁ) - surely (certainly, surely, undoubtedly)

(indeclinable)

Also used as an adverb in accusative neuter singular.

Root: dhru (class 1)

Note: Adverb modifying pradhakṣyati.

द्रौणिः (drauṇiḥ) - Aśvatthāman, the son of Droṇa (Drauni (son of Drona))

(proper noun)

Nominative, masculine, singular of Drauṇi

Drauṇi - son of Droṇa (Aśvatthāman)

Patronymic from Droṇa.

Note: Subject of the sentence.

प्रधक्ष्यति (pradhakṣyati) - will completely destroy by fire (will burn completely, will consume)

(verb)

3rd person , singular, active, future (lṛṭ) of dhakṣ

Future Tense, Third Person Singular

From root dah (to burn), forms future stem dhakṣ. Prefixed with pra.

Prefix: pra

Root: dah (class 1)

अस्त्रतेजसा (astratejasā) - by the potent energy of the supreme weapon (by the power of the weapon, with the energy of the missile)

(noun)

Instrumental, neuter, singular of astratejas

astratejas - the power or energy of a weapon

Tatpurusha compound.

Compound type : tatpuruṣa (astra+tejas)

• astra – weapon, missile
  noun (neuter)
  Root: as (class 4)
• tejas – brilliance, energy, power, radiance, vital force
  noun (neuter)
  Root: tij (class 7)

Note: Means or instrument of burning.