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

तं हत्वा विनिवर्तिष्ये कंसकेशिनिषूदनम् ।
अहत्वा न निवर्तिष्ये सत्येनायुधमालभे ॥१०॥

10. taṁ hatvā vinivartiṣye kaṁsakeśiniṣūdanam ,
ahatvā na nivartiṣye satyenāyudhamālabhe.

10. tam hatvā vinivartiṣye kaṃsakeśiniṣūdanam
ahatvā na nivartiṣye satyena āyudham ālabhe

10. Only after killing him—the slayer of Kaṃsa and Keśin—will I return. If I do not kill him, I will not return. I swear by my weapon, by this truth.

Words meanings summery:

• तम् (tam) - him, that

• हत्वा (hatvā) - having killed, after killing

• विनिवर्तिष्ये (vinivartiṣye) - I will return, I will come back

• कंसकेशिनिषूदनम् (kaṁsakeśiniṣūdanam) - Referring to Kṛṣṇa (the slayer of Kaṃsa and Keśin)

• अहत्वा (ahatvā) - without killing, not having killed

• न (na) - not, no

• निवर्तिष्ये (nivartiṣye) - I will return, I will come back

• सत्येन (satyena) - by truth, truly, by my word

• आयुधम् (āyudham) - weapon, implement

• आलभे (ālabhe) - Implies taking an oath or preparing for combat. (I touch, I grasp, I take)

Words meanings and morphology

तम् (tam) - him, that

(pronoun)

Accusative, masculine, singular of tad

tad - that, he, she, it

हत्वा (hatvā) - having killed, after killing

(indeclinable)

absolutive/gerund

Absolutive (indeclinable participle) formed with suffix -tvā from √han (to strike, kill).

Root: √han (class 2)

विनिवर्तिष्ये (vinivartiṣye) - I will return, I will come back

(verb)

1st person , singular, middle, future (lṛṭ) of vṛt

Future tense, middle voice, 1st person singular, from √vṛt (to turn) with upasargas vi- and ni-.

Prefixes: vi+ni

Root: √vṛt (class 1)

कंसकेशिनिषूदनम् (kaṁsakeśiniṣūdanam) - Referring to Kṛṣṇa (the slayer of Kaṃsa and Keśin)

(proper noun)

Accusative, masculine, singular of kaṃsakeśiniṣūdana

kaṁsakeśiniṣūdana - slayer of Kaṃsa and Keśin

Compound formed from Kaṃsa (proper noun) + Keśin (proper noun) + niṣūdana (slayer).

Compound type : tatpurusha (kaṃsa+keśin+niṣūdana)

• kaṃsa – Kaṃsa (a demonic king of Mathura, maternal uncle of Kṛṣṇa)
  proper noun (masculine)
• keśin – Keśin (a horse-demon slain by Kṛṣṇa)
  proper noun (masculine)
• niṣūdana – slayer, destroyer
  noun (masculine)
  From ni-√sūd (to kill, destroy).
  Prefix: ni
  Root: √sūd (class 10)

अहत्वा (ahatvā) - without killing, not having killed

(indeclinable)

negative absolutive/gerund

Negative absolutive (indeclinable participle) formed with prefix 'a-' and suffix '-tvā' from √han (to strike, kill).

Prefix: a

Root: √han (class 2)

न (na) - not, no

(indeclinable)

निवर्तिष्ये (nivartiṣye) - I will return, I will come back

(verb)

1st person , singular, middle, future (lṛṭ) of vṛt

Future tense, middle voice, 1st person singular, from √vṛt (to turn) with upasarga ni-.

Prefix: ni

Root: √vṛt (class 1)

सत्येन (satyena) - by truth, truly, by my word

(noun)

Instrumental, neuter, singular of satya

satya - truth, real, true

आयुधम् (āyudham) - weapon, implement

(noun)

Accusative, neuter, singular of āyudha

āyudha - weapon, implement

आलभे (ālabhe) - Implies taking an oath or preparing for combat. (I touch, I grasp, I take)

(verb)

1st person , singular, middle, present (laṭ) of labh

Present tense, middle voice, 1st person singular, from √labh (to obtain, grasp) with upasarga ā-.

Prefix: ā

Root: √labh (class 1)