महाभारतः mahābhārataḥ - book-10, chapter-1, verse-8

अवध्यः सर्वभूतानां वज्रसंहननो युवा ।
पाण्डवैः समरे पुत्रो निहतो मम संजय ॥८॥

8. avadhyaḥ sarvabhūtānāṁ vajrasaṁhanano yuvā ,
pāṇḍavaiḥ samare putro nihato mama saṁjaya.

8. avadhyaḥ sarvabhūtānām vajrasaṃhananaḥ yuvā
pāṇḍavaiḥ samare putraḥ nihataḥ mama saṃjaya

8. saṃjaya mama putraḥ sarvabhūtānām avadhyaḥ
vajrasaṃhananaḥ yuvā pāṇḍavaiḥ samare nihataḥ

8. Sanjaya, my son, who was invincible by all beings, young, and possessed a body firm as a thunderbolt, has been slain in battle by the Pandavas.

Words meanings summery:

• अवध्यः (avadhyaḥ) - invincible, not to be killed, immune to harm

• सर्वभूतानाम् (sarvabhūtānām) - by all beings, of all beings

• वज्रसंहननः (vajrasaṁhananaḥ) - having a body firm as a thunderbolt, thunderbolt-bodied

• युवा (yuvā) - young, youth

• पाण्डवैः (pāṇḍavaiḥ) - by the Pandavas

• समरे (samare) - in battle, in war

• पुत्रः (putraḥ) - son

• निहतः (nihataḥ) - slain, killed, struck down

• मम (mama) - my, of me

• संजय (saṁjaya) - O Sanjaya

Words meanings and morphology

अवध्यः (avadhyaḥ) - invincible, not to be killed, immune to harm

(adjective)

Nominative, masculine, singular of avadhya

avadhya - not to be killed, invulnerable, invincible

Gerundive

Derived from the root vadh (to strike, to kill) with the suffix -ya, and negated by 'a-'.

Root: vadh (class 1)

सर्वभूतानाम् (sarvabhūtānām) - by all beings, of all beings

(noun)

Genitive, masculine, plural of sarvabhūta

sarvabhūta - all beings, all creatures

Compound type : karmadhāraya (sarva+bhūta)

• sarva – all, every, entire
  adjective
• bhūta – being, creature, element, what has been
  noun (neuter)
  Past Passive Participle
  Root: bhū (class 1)

Note: Genitive case indicating 'by' for ability/invincibility.

वज्रसंहननः (vajrasaṁhananaḥ) - having a body firm as a thunderbolt, thunderbolt-bodied

(adjective)

Nominative, masculine, singular of vajrasaṃhanana

vajrasaṁhanana - having a compactness/body like a thunderbolt, adamantine-bodied

Compound type : bahuvrīhi (vajra+saṃhanana)

• vajra – thunderbolt, diamond
  noun (masculine)
• saṃhanana – compactness, firmness, structure, body
  noun (neuter)
  Prefix: sam
  Root: han (class 2)

युवा (yuvā) - young, youth

(adjective)

Nominative, masculine, singular of yuvan

yuvan - young, youth, young man

पाण्डवैः (pāṇḍavaiḥ) - by the Pandavas

(proper noun)

Instrumental, masculine, plural of pāṇḍava

pāṇḍava - descendant of Pandu, the Pandavas

समरे (samare) - in battle, in war

(noun)

Locative, masculine, singular of samara

samara - battle, war, combat

पुत्रः (putraḥ) - son

(noun)

Nominative, masculine, singular of putra

putra - son, child

निहतः (nihataḥ) - slain, killed, struck down

(adjective)

Nominative, masculine, singular of nihata

nihata - struck down, killed, destroyed

Past Passive Participle

Prefix: ni

Root: han (class 2)

मम (mama) - my, of me

(pronoun)

Genitive, singular of asmad

asmad - I, me

संजय (saṁjaya) - O Sanjaya

(proper noun)

Vocative, masculine, singular of saṃjaya

saṁjaya - Sanjaya (proper name)