महाभारतः mahābhārataḥ - book-3, chapter-169, verse-7

ततो निवातकवचा व्योम संछाद्य केवलम् ।
अदृश्या ह्यभ्यवर्तन्त विसृजन्तः शिलोच्चयान् ॥७॥

7. tato nivātakavacā vyoma saṁchādya kevalam ,
adṛśyā hyabhyavartanta visṛjantaḥ śiloccayān.

7. tataḥ nivātakavacāḥ vyoma saṃchādya kevalam
adṛśyāḥ hi abhyavartanta visṛjantaḥ śiloccayān

7. Then the Nivātakavacas, having completely covered the sky, became invisible and indeed attacked, releasing huge rocks.

Words meanings summery:

• ततः (tataḥ) - then, from there, therefore

• निवातकवचाः (nivātakavacāḥ) - the Nivātakavacas (a class of demons)

• व्योम (vyoma) - the sky, atmosphere, space

• संछाद्य (saṁchādya) - having covered completely

• केवलम् (kevalam) - completely, entirely, only

• अदृश्याः (adṛśyāḥ) - invisible

• हि (hi) - indeed, surely, for

• अभ्यवर्तन्त (abhyavartanta) - they attacked, advanced towards

• विसृजन्तः (visṛjantaḥ) - releasing, throwing, abandoning

• शिलोच्चयान् (śiloccayān) - heaps of stones, rocks

Words meanings and morphology

ततः (tataḥ) - then, from there, therefore

(indeclinable)

निवातकवचाः (nivātakavacāḥ) - the Nivātakavacas (a class of demons)

(proper noun)

Nominative, masculine, plural of nivātakavaca

nivātakavaca - Nivātakavaca (a class of demons)

Compound type : Bahuvrihi (nivāta+kavaca)

• nivāta – windless, still; calm
  adjective (masculine)
• kavaca – armor, mail
  noun (masculine)

व्योम (vyoma) - the sky, atmosphere, space

(noun)

Accusative, neuter, singular of vyoman

vyoman - the sky, atmosphere, space

संछाद्य (saṁchādya) - having covered completely

(indeclinable)

Absolutive

Derived from root chad with prefix sam

Prefix: sam

Root: chad (class 1)

केवलम् (kevalam) - completely, entirely, only

(adjective)

Accusative, neuter, singular of kevala

kevala - whole, entire, exclusive, only

Note: Used adverbially here

अदृश्याः (adṛśyāḥ) - invisible

(adjective)

Nominative, masculine, plural of adṛśya

adṛśya - invisible, not to be seen

Compound type : Nañ-tatpuruṣa (a+dṛśya)

• a – not, non-
  indeclinable
• dṛśya – visible, to be seen
  adjective (masculine)
  Gerundive
  Formed from root dṛś with suffix -ya
  Root: dṛś (class 1)

हि (hi) - indeed, surely, for

(indeclinable)

अभ्यवर्तन्त (abhyavartanta) - they attacked, advanced towards

(verb)

3rd person , plural, middle, past imperfect (laṅ) of abhyavartanta

Imperfect 3rd plural middle voice with prefix abhi

Prefix: abhi

Root: vṛt (class 1)

विसृजन्तः (visṛjantaḥ) - releasing, throwing, abandoning

(participle)

Nominative, masculine, plural of visṛjat

visṛjat - releasing, throwing, abandoning

Present Active Participle

Derived from root sṛj with prefix vi

Prefix: vi

Root: sṛj (class 6)

शिलोच्चयान् (śiloccayān) - heaps of stones, rocks

(noun)

Accusative, masculine, plural of śiloccaya

śiloccaya - heap of stones, rock

Compound type : Tatpurusha (śilā+uccaya)

• śilā – stone, rock
  noun (feminine)
• uccaya – heap, accumulation, mound
  noun (masculine)
  Prefix: ut
  Root: ci (class 5)