महाभारतः mahābhārataḥ - book-2, chapter-20, verse-34

नात्मनात्मवतां मुख्य इयेष मधुसूदनः ।
ब्रह्मणोऽऽज्ञां पुरस्कृत्य हन्तुं हलधरानुजः ॥३४॥

34. nātmanātmavatāṁ mukhya iyeṣa madhusūdanaḥ ,
brahmaṇo''jñāṁ puraskṛtya hantuṁ haladharānujaḥ.

34. na ātmanā ātmanavatām mukhyaḥ iyeṣa madhusūdanaḥ
brahmaṇaḥ ājñām puraskṛtya hantum haladharānujaḥ

34. The foremost among those possessing self-control (ātman), Kṛṣṇa (Madhusūdana), the younger brother of Baladeva (Haladharānuja), did not desire to kill [Jarāsaṅdha] himself, having honored Brahmā's command.

Words meanings summery:

• न (na) - not

• आत्मना (ātmanā) - by himself, by the self

• आत्मनवताम् (ātmanavatām) - of those possessing self-control, of the wise

• मुख्यः (mukhyaḥ) - An epithet for Kṛṣṇa. (chief, foremost, principal)

• इयेष (iyeṣa) - desired, wished

• मधुसूदनः (madhusūdanaḥ) - An epithet for Kṛṣṇa. (slayer of Madhu)

• ब्रह्मणः (brahmaṇaḥ) - of Brahmā

• आज्ञाम् (ājñām) - command, order

• पुरस्कृत्य (puraskṛtya) - having placed in front, having honored, having followed

• हन्तुम् (hantum) - to kill

• हलधरानुजः (haladharānujaḥ) - An epithet for Kṛṣṇa. (younger brother of Haladhara (Baladeva))

Words meanings and morphology

न (na) - not

(indeclinable)

आत्मना (ātmanā) - by himself, by the self

(noun)

Instrumental, masculine, singular of ātman

ātman - self, soul, spirit, individual self, essential nature

आत्मनवताम् (ātmanavatām) - of those possessing self-control, of the wise

(adjective)

Genitive, masculine, plural of ātmanavat

ātmanavat - possessing self, self-possessed, wise, controlled

Possessive suffix -vat applied to ātman

मुख्यः (mukhyaḥ) - An epithet for Kṛṣṇa. (chief, foremost, principal)

(adjective)

Nominative, masculine, singular of mukhya

mukhya - chief, principal, foremost, main

इयेष (iyeṣa) - desired, wished

(verb)

3rd person , singular, active, perfect (liṭ) of iṣ

Root: iṣ (class 4)

मधुसूदनः (madhusūdanaḥ) - An epithet for Kṛṣṇa. (slayer of Madhu)

(proper noun)

Nominative, masculine, singular of madhusūdana

madhusūdana - slayer of the demon Madhu; an epithet of Kṛṣṇa

Compound type : tatpuruṣa (madhu+sūdana)

• madhu – sweet, honey; name of a demon
  noun (masculine)
• sūdana – destroyer, slayer
  noun (masculine)
  Agent Noun
  From root sūd (to kill, destroy)
  Root: sūd (class 10)

ब्रह्मणः (brahmaṇaḥ) - of Brahmā

(proper noun)

Genitive, masculine, singular of brahman

brahman - Brahmā (the creator god), prayer, sacred word

आज्ञाम् (ājñām) - command, order

(noun)

Accusative, feminine, singular of ājñā

ājñā - command, order, permission

पुरस्कृत्य (puraskṛtya) - having placed in front, having honored, having followed

(indeclinable)

Absolutive

From root kṛ (to do) with upasarga puras-

Prefix: puras

Root: kṛ (class 8)

हन्तुम् (hantum) - to kill

(verb)

infinitive of han

Infinitive

Root: han (class 2)

हलधरानुजः (haladharānujaḥ) - An epithet for Kṛṣṇa. (younger brother of Haladhara (Baladeva))

(proper noun)

Nominative, masculine, singular of haladharānuja

haladharānuja - younger brother of Haladhara (Balarāma); an epithet of Kṛṣṇa

Compound type : tatpuruṣa (haladhara+anuja)

• haladhara – one who bears a plow; an epithet of Balarāma
  noun (masculine)
• anuja – younger brother
  noun (masculine)