महाभारतः mahābhārataḥ - book-3, chapter-267, verse-53

प्रतिपन्नौ यदा रूपं राक्षसं तौ निशाचरौ ।
दर्शयित्वा ततः सैन्यं रामः पश्चादवासृजत् ॥५३॥

53. pratipannau yadā rūpaṁ rākṣasaṁ tau niśācarau ,
darśayitvā tataḥ sainyaṁ rāmaḥ paścādavāsṛjat.

53. pratipannau yadā rūpam rākṣasam tau niśācarau
darśayitvā tataḥ sainyam rāmaḥ paścāt avāsṛjat

53. When those two night-wanderers (Rākṣasas) had regained their Rākṣasa form, Rama then showed them his army and afterwards released them.

Words meanings summery:

• प्रतिपन्नौ (pratipannau) - having assumed, having obtained, having regained

• यदा (yadā) - when, at which time

• रूपम् (rūpam) - form, appearance, nature

• राक्षसम् (rākṣasam) - Rākṣasa-like, demonic

• तौ (tau) - those two

• निशाचरौ (niśācarau) - two night-wanderers, two Rākṣasas

• दर्शयित्वा (darśayitvā) - having shown, having caused to see

• ततः (tataḥ) - then, thereafter

• सैन्यम् (sainyam) - army, military force

• रामः (rāmaḥ) - Rama

• पश्चात् (paścāt) - afterwards, behind, later

• अवासृजत् (avāsṛjat) - he released, he sent away

Words meanings and morphology

प्रतिपन्नौ (pratipannau) - having assumed, having obtained, having regained

(adjective)

Nominative, masculine, dual of pratipanna

pratipanna - assumed, obtained, regained

Past Passive Participle

PPP of root pad with prefix prati

Prefix: prati

Root: pad (class 4)

Note: modifies tau and niśācarau

यदा (yadā) - when, at which time

(indeclinable)

रूपम् (rūpam) - form, appearance, nature

(noun)

Accusative, neuter, singular of rūpa

rūpa - form, appearance, nature, beauty

राक्षसम् (rākṣasam) - Rākṣasa-like, demonic

(adjective)

Accusative, neuter, singular of rākṣasa

rākṣasa - Rākṣasa, demonic

Note: modifies rūpam

तौ (tau) - those two

(pronoun)

Nominative, masculine, dual of tad

tad - that, those

निशाचरौ (niśācarau) - two night-wanderers, two Rākṣasas

(noun)

Nominative, masculine, dual of niśācara

niśācara - night-wanderer, Rākṣasa

compound of niśā and cara

Compound type : upapada tatpurusha (niśā+cara)

• niśā – night
  noun (feminine)
• cara – moving, walking, wanderer
  adjective (masculine)
  derived from root car
  Root: car (class 1)

दर्शयित्वा (darśayitvā) - having shown, having caused to see

(indeclinable)

absolutive (causative)

absolutive of causative of root dṛś

Root: dṛś (class 1)

ततः (tataḥ) - then, thereafter

(indeclinable)

सैन्यम् (sainyam) - army, military force

(noun)

Accusative, neuter, singular of sainya

sainya - army, military force

रामः (rāmaḥ) - Rama

(proper noun)

Nominative, masculine, singular of rāma

rāma - Rama (proper name)

पश्चात् (paścāt) - afterwards, behind, later

(indeclinable)

अवासृजत् (avāsṛjat) - he released, he sent away

(verb)

3rd person , singular, active, past imperfect (laṅ) of sṛj

imperfect, 3rd person singular

Laṅ L-form, 3rd person singular, parasmaipada, with upasarga ava

Prefix: ava

Root: sṛj (class 6)