महाभारतः mahābhārataḥ - book-7, chapter-160, verse-18

निवातकवचाश्चापि देवानां शत्रवस्तथा ।
सुरैरवध्याः संग्रामे तेन वीरेण निर्जिताः ॥१८॥

18. nivātakavacāścāpi devānāṁ śatravastathā ,
surairavadhyāḥ saṁgrāme tena vīreṇa nirjitāḥ.

18. nivātakavacāḥ ca api devānāṃ śatravaḥ tathā
suraiḥ avadhyāḥ saṃgrāme tena vīreṇa nirjitāḥ

18. devānām śatravaḥ tathā suraiḥ saṃgrāme avadhyāḥ
ca api nivātakavacāḥ tena vīreṇa nirjitāḥ

18. And also the Nivātakavachas, who were the enemies of the gods and unconquerable by the gods in battle, were vanquished by that hero.

Words meanings summery:

• निवातकवचाः (nivātakavacāḥ) - Nivātakavachas (a class of powerful demons)

• च (ca) - and, also

• अपि (api) - even, also, too

• देवानाम् (devānām) - of the gods

• शत्रवः (śatravaḥ) - enemies

• तथा (tathā) - thus, so, also, and

• सुरैः (suraiḥ) - by the gods

• अवध्याः (avadhyāḥ) - unconquerable, not to be killed

• संग्रामे (saṁgrāme) - in battle, in war

• तेन (tena) - by him (Arjuna) (by him, by that)

• वीरेण (vīreṇa) - by the hero

• निर्जिताः (nirjitāḥ) - conquered, vanquished, completely defeated

Words meanings and morphology

निवातकवचाः (nivātakavacāḥ) - Nivātakavachas (a class of powerful demons)

(proper noun)

Nominative, masculine, plural of nivātakavaca

nivātakavaca - a class of powerful demons, literally 'whose armor is impenetrable to wind'

Compound type : bahuvrīhi (nivāta+kavaca)

• nivāta – windless, impenetrable to wind
  adjective
  Prefix: ni
  Root: vā (class 2)
• kavaca – armor, mail
  noun (masculine)

च (ca) - and, also

(indeclinable)

अपि (api) - even, also, too

(indeclinable)

देवानाम् (devānām) - of the gods

(noun)

Genitive, masculine, plural of deva

deva - god, deity, celestial being

Root: div (class 4)

शत्रवः (śatravaḥ) - enemies

(noun)

Nominative, masculine, plural of śatru

śatru - enemy, foe

Root: śad (class 1)

तथा (tathā) - thus, so, also, and

(indeclinable)

सुरैः (suraiḥ) - by the gods

(noun)

Instrumental, masculine, plural of sura

sura - god, deity

Root: sū (class 2)

अवध्याः (avadhyāḥ) - unconquerable, not to be killed

(gerundive)

Compound type : nañ-tatpuruṣa (a+vadhya)

• a – not, non-
  indeclinable
• vadhya – to be killed, killable
  gerundive (masculine)
  Gerundive
  Derived from root 'han'.
  Root: han (class 2)

संग्रामे (saṁgrāme) - in battle, in war

(noun)

Locative, masculine, singular of saṃgrāma

saṁgrāma - battle, war, conflict

Prefix: sam

Root: grām (class 1)

तेन (tena) - by him (Arjuna) (by him, by that)

(pronoun)

Instrumental, masculine, singular of tad

tad - that, he, she, it

वीरेण (vīreṇa) - by the hero

(noun)

Instrumental, masculine, singular of vīra

vīra - hero, brave man, warrior

Root: vī (class 2)

निर्जिताः (nirjitāḥ) - conquered, vanquished, completely defeated

(past passive participle)