महाभारतः mahābhārataḥ - book-3, chapter-193, verse-19

अवध्यो देवतानां स दैत्यानामथ रक्षसाम् ।
नागानामथ यक्षाणां गन्धर्वाणां च सर्वशः ।
अवाप्य स वरं राजन्सर्वलोकपितामहात् ॥१९॥

19. avadhyo devatānāṁ sa daityānāmatha rakṣasām ,
nāgānāmatha yakṣāṇāṁ gandharvāṇāṁ ca sarvaśaḥ ,
avāpya sa varaṁ rājansarvalokapitāmahāt.

19. avadhyah devatānām saḥ daityānām
atha rakṣasām nāgānām atha yakṣāṇām
gandharvāṇām ca sarvaśaḥ avāpya
saḥ varam rājan sarvalokapitāmahāt

19. O King, having obtained a boon from the grandfather of all worlds, he is entirely invulnerable to the gods, the daityas, the rakshasas, the nagas, the yakshas, and the gandharvas.

Words meanings summery:

• अवध्यह् (avadhyah) - not to be killed, invulnerable, unslayable

• देवतानाम् (devatānām) - of the gods, by the gods

• सः (saḥ) - he, that

• दैत्यानाम् (daityānām) - of the daityas (demons), by the daityas

• अथ (atha) - and, then, now, moreover

• रक्षसाम् (rakṣasām) - of the rakshasas (demons), by the rakshasas

• नागानाम् (nāgānām) - of the nāgas (serpent deities), by the nāgas

• अथ (atha) - and, then, now, moreover

• यक्षाणाम् (yakṣāṇām) - of the yakshas (nature spirits), by the yakshas

• गन्धर्वाणाम् (gandharvāṇām) - of the gandharvas (celestial musicians), by the gandharvas

• च (ca) - and, also

• सर्वशः (sarvaśaḥ) - entirely, completely, in every way, all around

• अवाप्य (avāpya) - having obtained, having reached, having gained

• सः (saḥ) - he, that

• वरम् (varam) - boon, blessing, best thing

• राजन् (rājan) - O King

• सर्वलोकपितामहात् (sarvalokapitāmahāt) - from the grandfather of all worlds, from Brahma

Words meanings and morphology

अवध्यह् (avadhyah) - not to be killed, invulnerable, unslayable

(adjective)

Nominative, masculine, singular of avadhya

avadhya - not to be slain, invulnerable, unkillable

Gerundive

from a-vadh (root han), suffix -ya

Prefix: a

Root: han (class 2)

Note: Literally "not to be killed," functioning as "invulnerable."

देवतानाम् (devatānām) - of the gods, by the gods

(noun)

Genitive, feminine, plural of devatā

devatā - divinity, godhead, a deity

सः (saḥ) - he, that

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

demonstrative pronoun

दैत्यानाम् (daityānām) - of the daityas (demons), by the daityas

(proper noun)

Genitive, masculine, plural of daitya

daitya - a class of demons, sons of Diti

अथ (atha) - and, then, now, moreover

(indeclinable)

Note: Used here to connect lists, similar to 'and'.

रक्षसाम् (rakṣasām) - of the rakshasas (demons), by the rakshasas

(noun)

Genitive, neuter, plural of rakṣas

rakṣas - a demon, goblin, fiend

Note: Forms `rakṣasām` as an irregular plural genitive.

नागानाम् (nāgānām) - of the nāgas (serpent deities), by the nāgas

(noun)

Genitive, masculine, plural of nāga

nāga - serpent, snake; a class of semi-divine beings (serpent deities)

अथ (atha) - and, then, now, moreover

(indeclinable)

Note: Used here to connect lists, similar to 'and'.

यक्षाणाम् (yakṣāṇām) - of the yakshas (nature spirits), by the yakshas

(noun)

Genitive, masculine, plural of yakṣa

yakṣa - a class of supernatural beings, usually benevolent nature spirits

गन्धर्वाणाम् (gandharvāṇām) - of the gandharvas (celestial musicians), by the gandharvas

(noun)

Genitive, masculine, plural of gandharva

gandharva - a class of celestial musicians and minor deities

च (ca) - and, also

(indeclinable)

सर्वशः (sarvaśaḥ) - entirely, completely, in every way, all around

(indeclinable)

adverbial suffix -śaḥ

अवाप्य (avāpya) - having obtained, having reached, having gained

(indeclinable)

absolutive (gerund)

from ava-āp, suffix -ya after prefix

Prefixes: ava+ā

Root: āp (class 5)

सः (saḥ) - he, that

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

demonstrative pronoun

Note: Refers to the same being as the first `saḥ`.

वरम् (varam) - boon, blessing, best thing

(noun)

Accusative, masculine, singular of vara

vara - boon, wish, blessing; choice, excellent

Note: Object of `avāpya`.

राजन् (rājan) - O King

(noun)

Vocative, masculine, singular of rājan

rājan - king, ruler

सर्वलोकपितामहात् (sarvalokapitāmahāt) - from the grandfather of all worlds, from Brahma

(proper noun)

Ablative, masculine, singular of sarvalokapitāmaha

sarvalokapitāmaha - the grandfather of all worlds (an epithet for Brahmā)

Compound type : tatpuruṣa (sarva+loka+pitāmaha)

• sarva – all, every
  adjective (masculine)
• loka – world, people, region
  noun (masculine)
• pitāmaha – grandfather, great-father (an epithet of Brahmā)
  proper noun (masculine)

Note: Source of the boon.