महाभारतः mahābhārataḥ - book-5, chapter-13, verse-13

पुण्येन हयमेधेन मामिष्ट्वा पाकशासनः ।
पुनरेष्यति देवानामिन्द्रत्वमकुतोभयः ॥१३॥

13. puṇyena hayamedhena māmiṣṭvā pākaśāsanaḥ ,
punareṣyati devānāmindratvamakutobhayaḥ.

13. puṇyena haya-medhena mām iṣṭvā pāka-śāsanaḥ
punaḥ eṣyati devānām indratvam akutobhayaḥ

13. Having worshipped Me through a meritorious horse sacrifice (hayamedha), Indra (Pākaśāsana) will regain his status as the lord of the gods (Indratva) fearless (akutobhaya).

Words meanings summery:

• पुण्येन (puṇyena) - by the meritorious, by the sacred

• हय-मेधेन (haya-medhena) - by the horse sacrifice (hayamedha)

• माम् (mām) - me

• इष्ट्वा (iṣṭvā) - having worshipped, having sacrificed

• पाक-शासनः (pāka-śāsanaḥ) - Indra (Pākaśāsana)

• पुनः (punaḥ) - again, once more

• एष्यति (eṣyati) - will go, will attain, will come

• देवानाम् (devānām) - of the gods

• इन्द्रत्वम् (indratvam) - the state of being Indra, Indra's status

• अकुतोभयः (akutobhayaḥ) - fearless, free from all fear

Words meanings and morphology

पुण्येन (puṇyena) - by the meritorious, by the sacred

(adjective)

Instrumental, neuter, singular of puṇya

puṇya - meritorious, sacred, virtuous, holy

हय-मेधेन (haya-medhena) - by the horse sacrifice (hayamedha)

(noun)

Instrumental, masculine, singular of haya-medha

haya-medha - horse sacrifice (hayamedha)

Compound type : tatpurusha (haya+medha)

• haya – horse
  noun (masculine)
• medha – sacrifice, oblation
  noun (masculine)

माम् (mām) - me

(pronoun)

Accusative, singular of aham

aham - I

इष्ट्वा (iṣṭvā) - having worshipped, having sacrificed

(indeclinable)

Absolutive (gerund)

Derived from root yaj.

Root: yaj (class 1)

पाक-शासनः (pāka-śāsanaḥ) - Indra (Pākaśāsana)

(proper noun)

Nominative, masculine, singular of pāka-śāsana

pāka-śāsana - controller of Pāka (an asura), epithet of Indra

Compound type : tatpurusha (pāka+śāsana)

• pāka – a name of an Asura; raw, immature
  noun (masculine)
• śāsana – ruler, controller, discipliner
  noun (masculine)

पुनः (punaḥ) - again, once more

(indeclinable)

एष्यति (eṣyati) - will go, will attain, will come

(verb)

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

Root: i (class 2)

देवानाम् (devānām) - of the gods

(noun)

Genitive, masculine, plural of deva

deva - god, deity

इन्द्रत्वम् (indratvam) - the state of being Indra, Indra's status

(noun)

Accusative, neuter, singular of indratva

indratva - the state or rank of Indra, Indra-ship

अकुतोभयः (akutobhayaḥ) - fearless, free from all fear

(adjective)

Nominative, masculine, singular of akutobhaya

akutobhaya - fearless, secure, free from danger

Compound type : bahuvrihi (a+kutaḥ+bhaya)

• a – not, non-
  indeclinable
• kutaḥ – from where, whence
  indeclinable
• bhaya – fear, dread
  noun (neuter)