महाभारतः mahābhārataḥ - book-10, chapter-11, verse-25

यथैतान्यकृथाः पार्थ महाकर्माणि वै पुरा ।
तथा द्रौणिममित्रघ्न विनिहत्य सुखी भव ॥२५॥

25. yathaitānyakṛthāḥ pārtha mahākarmāṇi vai purā ,
tathā drauṇimamitraghna vinihatya sukhī bhava.

25. yathā etāni akṛthāḥ pārtha mahākarmāṇi vai purā
tathā drauṇim amitragnā vinihatya sukhī bhava

25. pārtha amitragnā,
purā vai yathā etāni mahākarmāṇi akṛthāḥ,
tathā drauṇim vinihatya sukhī bhava

25. Just as you, O Pārtha, performed these great deeds in the past, so too, O slayer of foes, having slain Droṇi (Aśvatthāman), be happy.

Words meanings summery:

• यथा (yathā) - as, just as, in whichever way

• एतानि (etāni) - these

• अकृथाः (akṛthāḥ) - you did, you performed

• पार्थ (pārtha) - Addressed to Arjuna, son of Pṛthā (Kuntī). (O Pārtha, son of Pṛthā (Kuntī))

• महाकर्माणि (mahākarmāṇi) - great deeds, mighty actions

• वै (vai) - indeed, surely, verily

• पुरा (purā) - before, formerly, in the past, anciently

• तथा (tathā) - so, thus, in that way, similarly

• द्रौणिम् (drauṇim) - Refers to Aśvatthāman, son of Droṇa. (Droṇi, son of Droṇa (Aśvatthāman))

• अमित्रग्ना (amitragnā) - An epithet for the addressing of the hero (Arjuna). (O slayer of enemies, O foe-slayer)

• विनिहत्य (vinihatya) - having slain, having killed

• सुखी (sukhī) - happy, joyful, comfortable

• भव (bhava) - be, become

Words meanings and morphology

यथा (yathā) - as, just as, in whichever way

(indeclinable)

एतानि (etāni) - these

(pronoun)

Accusative, neuter, plural of etad

etad - this

Note: Could also be nominative plural neuter, but accusative fits the context of direct object of 'performed'.

अकृथाः (akṛthāḥ) - you did, you performed

(verb)

2nd person , singular, middle, past aorist (luṅ) of kṛ

Aorist

Root kṛ (8th class), Aorist (luṅ), Middle Voice (ātmanepada), 2nd Person Singular

Root: kṛ (class 8)

पार्थ (pārtha) - Addressed to Arjuna, son of Pṛthā (Kuntī). (O Pārtha, son of Pṛthā (Kuntī))

(proper noun)

Vocative, masculine, singular of pārtha

pārtha - son of Pṛthā (Kuntī); a name for Arjuna

Derived from Pṛthā (Kuntī), meaning 'related to Pṛthā'.

महाकर्माणि (mahākarmāṇi) - great deeds, mighty actions

(noun)

Accusative, neuter, plural of mahākarman

mahākarman - great deed, mighty action

Compound type : karmadhāraya (mahat+karman)

• mahat – great, large, mighty
  adjective
• karman – action, deed, work, ritual (karma)
  noun (neuter)
  Root: kṛ (class 8)

Note: Could also be nominative plural neuter, but accusative fits the context of direct object of 'performed'.

वै (vai) - indeed, surely, verily

(indeclinable)

पुरा (purā) - before, formerly, in the past, anciently

(indeclinable)

तथा (tathā) - so, thus, in that way, similarly

(indeclinable)

द्रौणिम् (drauṇim) - Refers to Aśvatthāman, son of Droṇa. (Droṇi, son of Droṇa (Aśvatthāman))

(proper noun)

Accusative, masculine, singular of drauṇi

drauṇi - son of Droṇa; a name for Aśvatthāman

Patronymic derived from Droṇa.

अमित्रग्ना (amitragnā) - An epithet for the addressing of the hero (Arjuna). (O slayer of enemies, O foe-slayer)

(adjective)

Vocative, masculine, singular of amitragnā

amitragnā - foe-slayer, slayer of enemies

Compound type : upapada-tatpuruṣa (amitra+ghna)

• amitra – enemy, foe; not a friend
  noun (masculine)
  Prefix: a
• ghna – slaying, destroying, killer
  adjective (masculine)
  Derived from root 'han' (to strike, kill) with suffix -a.
  Root: han (class 2)

विनिहत्य (vinihatya) - having slain, having killed

(indeclinable)

Absolutive (Gerund)

Formed from root 'han' (to strike, kill) with upasargas 'vi' and 'ni', and the absolutive suffix -ya.

Prefixes: vi+ni

Root: han (class 2)

सुखी (sukhī) - happy, joyful, comfortable

(adjective)

Nominative, masculine, singular of sukhin

sukhin - happy, joyful, at ease, possessing happiness

Derived from 'sukha' (happiness) with the possessive suffix -in.

भव (bhava) - be, become

(verb)

2nd person , singular, active, imperative (loṭ) of bhū

Imperative

Root bhū (1st class), Imperative (loṭ), Active Voice (parasmaipada), 2nd Person Singular

Root: bhū (class 1)