महाभारतः mahābhārataḥ - book-3, chapter-170, verse-54

सुरासुरैरवध्यं हि पुरमेतत्खगं महत् ।
त्वया विमथितं वीर स्ववीर्यास्त्रतपोबलात् ॥५४॥

54. surāsurairavadhyaṁ hi purametatkhagaṁ mahat ,
tvayā vimathitaṁ vīra svavīryāstratapobalāt.

54. surāsuraiḥ avadhyam hi puram etat khagam mahat
tvayā vimathitam vīra svavīryāstratapobalāt

54. O hero, this great city 'Khaga', which was indeed indestructible by gods and demons, was utterly destroyed by you through the power of your own valor, weapons, and spiritual austerity (tapas).

Words meanings summery:

• सुरासुरैः (surāsuraiḥ) - by gods and demons

• अवध्यम् (avadhyam) - indestructible (not to be killed, indestructible, inviolable)

• हि (hi) - indeed (indeed, surely, for)

• पुरम् (puram) - city (city, fortress, abode)

• एतत् (etat) - this

• खगम् (khagam) - Khaga (the city) (moving in the sky, bird; name of a city)

• महत् (mahat) - great (great, mighty, large)

• त्वया (tvayā) - by you

• विमथितम् (vimathitam) - utterly destroyed (churned, crushed, utterly destroyed)

• वीर (vīra) - O hero (hero, brave man)

• स्ववीर्यास्त्रतपोबलात् (svavīryāstratapobalāt) - through the power of your own valor, weapons, and spiritual austerity (through the power of one's own valor, weapons, and asceticism)

Words meanings and morphology

सुरासुरैः (surāsuraiḥ) - by gods and demons

(noun)

Instrumental, masculine, plural of surāsura

surāsura - gods and demons

Compound type : dvandva (sura+asura)

• sura – god, deity
  noun (masculine)
• asura – demon, titan
  noun (masculine)

Note: Refers to those by whom the city was indestructible.

अवध्यम् (avadhyam) - indestructible (not to be killed, indestructible, inviolable)

(adjective)

Nominative, neuter, singular of avadhya

avadhya - not to be killed, indestructible, inviolable

Gerundive

Derived from root vadh (to kill) with -ya suffix, prefixed with 'a' for negation

Compound type : nañ-tatpuruṣa (a+vadhya)

• a – not, non-
  indeclinable
• vadhya – to be killed, vulnerable
  adjective
  Gerundive
  Derived from root vadh with -ya suffix
  Root: vadh (class 1)

Note: Qualifies 'puram'.

हि (hi) - indeed (indeed, surely, for)

(indeclinable)

Note: Emphatic particle.

पुरम् (puram) - city (city, fortress, abode)

(noun)

Nominative, neuter, singular of pura

pura - city, fortress, abode

Note: Subject of the clause.

एतत् (etat) - this

(pronoun)

Nominative, neuter, singular of etas

etas - this, this one

Note: Qualifies 'puram'.

खगम् (khagam) - Khaga (the city) (moving in the sky, bird; name of a city)

(proper noun)

Nominative, neuter, singular of khaga

khaga - moving in the sky, bird; a specific city name

Note: Name of the city, in apposition to 'puram'.

महत् (mahat) - great (great, mighty, large)

(adjective)

Nominative, neuter, singular of mahat

mahat - great, mighty, large

Note: Qualifies 'puram'.

त्वया (tvayā) - by you

(pronoun)

Instrumental, singular of tva

tva - you

Note: Agent of the past passive participle 'vimathitam'.

विमथितम् (vimathitam) - utterly destroyed (churned, crushed, utterly destroyed)

(adjective)

Nominative, neuter, singular of vimathita

vimathita - churned, crushed, utterly destroyed

Past Passive Participle

Derived from root math with prefix vi- and -ita suffix

Prefix: vi

Root: math (class 1)

Note: Predicate for 'puram'.

वीर (vīra) - O hero (hero, brave man)

(noun)

Vocative, masculine, singular of vīra

vīra - hero, brave man

Note: Addressed to the hero of the narrative.

स्ववीर्यास्त्रतपोबलात् (svavīryāstratapobalāt) - through the power of your own valor, weapons, and spiritual austerity (through the power of one's own valor, weapons, and asceticism)

(noun)

Ablative, neuter, singular of svavīryāstratapobala

svavīryāstratapobala - power from one's own valor, weapons, and asceticism

Compound type : dvandva-tatpuruṣa (sva+vīrya+astra+tapas+bala)

• sva – own, one's self
  pronoun
• vīrya – valor, strength, heroism
  noun (neuter)
• astra – weapon, missile
  noun (neuter)
• tapas – asceticism, spiritual austerity, penance, heat
  noun (neuter)
  Root: tap (class 1)
• bala – strength, power, force
  noun (neuter)

Note: Indicates the means or cause for the destruction of the city.