महाभारतः mahābhārataḥ - book-1, chapter-38, verse-22

इति श्रुत्वा वचो घोरं स राजा कुरुनन्दनः ।
पर्यतप्यत तत्पापं कृत्वा राजा महातपाः ॥२२॥

22. iti śrutvā vaco ghoraṁ sa rājā kurunandanaḥ ,
paryatapyata tatpāpaṁ kṛtvā rājā mahātapāḥ.

22. iti śrutvā vacaḥ ghoram saḥ rājā kurunandanaḥ
paryatapyata tat pāpam kṛtvā rājā mahātapāḥ

22. Having heard these dreadful words, that King, the joy of the Kurus, the great ascetic, deeply repented, having committed that sin.

Words meanings summery:

• इति (iti) - marking the conclusion of the messenger's words (thus, so; indicates direct speech or quotation)

• श्रुत्वा (śrutvā) - having heard

• वचः (vacaḥ) - the words (of the messenger, describing the curse) (word, speech, statement)

• घोरम् (ghoram) - dreadful (words) (terrible, dreadful, fierce)

• सः (saḥ) - that (King Parikshit) (that, he)

• राजा (rājā) - King (Parikshit) (king)

• कुरुनन्दनः (kurunandanaḥ) - King Parikshit, a descendant of the Kuru dynasty (delight of the Kurus, a Kuru prince)

• पर्यतप्यत (paryatapyata) - he repented deeply (he suffered greatly, he repented)

• तत् (tat) - that specific (sin) (that)

• पापम् (pāpam) - the sin (of putting a snake on the sage) (sin, evil deed)

• कृत्वा (kṛtvā) - having committed (having done, having made, having performed)

• राजा (rājā) - King (Parikshit) (king)

• महातपाः (mahātapāḥ) - the great ascetic (Śamīka - or the king himself, depending on interpretation, here probably referring to the sage Śamīka whose tapas was insulted) (one of great austerity, a great ascetic)

Words meanings and morphology

इति (iti) - marking the conclusion of the messenger's words (thus, so; indicates direct speech or quotation)

(indeclinable)

श्रुत्वा (śrutvā) - having heard

(verb)

active

Root: śru (class 5)

वचः (vacaḥ) - the words (of the messenger, describing the curse) (word, speech, statement)

(noun)

Accusative, neuter, singular of vacas

vacas - word, speech, saying, statement

Root: vac (class 2)

घोरम् (ghoram) - dreadful (words) (terrible, dreadful, fierce)

(adjective)

Accusative, neuter, singular of ghora

ghora - terrible, dreadful, formidable, fierce, awful

सः (saḥ) - that (King Parikshit) (that, he)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

राजा (rājā) - King (Parikshit) (king)

(noun)

Nominative, masculine, singular of rājan

rājan - king, sovereign, ruler

Root: rāj (class 1)

कुरुनन्दनः (kurunandanaḥ) - King Parikshit, a descendant of the Kuru dynasty (delight of the Kurus, a Kuru prince)

(noun)

Nominative, masculine, singular of kurunandana

kurunandana - descendant of Kuru, joy of the Kurus

Compound type : ṣaṣṭhī tatpuruṣa (kuru+nandana)

• kuru – Kuru (name of an ancient king, dynasty, or region)
  proper noun (masculine)
• nandana – son, child; delighting, gladdening
  noun (masculine)
  agent noun
  derived from √nand (to rejoice)
  Root: nand (class 1)

पर्यतप्यत (paryatapyata) - he repented deeply (he suffered greatly, he repented)

(verb)

3rd person , singular, middle, past imperfect (laṅ) of pari-tap

Prefix: pari

Root: tap (class 1)

तत् (tat) - that specific (sin) (that)

(pronoun)

Accusative, neuter, singular of tad

tad - that, he, she, it

पापम् (pāpam) - the sin (of putting a snake on the sage) (sin, evil deed)

(noun)

Accusative, neuter, singular of pāpa

pāpa - evil, bad, wicked; sin, vice, crime

कृत्वा (kṛtvā) - having committed (having done, having made, having performed)

(verb)

active

Root: kṛ (class 8)

राजा (rājā) - King (Parikshit) (king)

(noun)

Nominative, masculine, singular of rājan

rājan - king, sovereign, ruler

Root: rāj (class 1)

महातपाः (mahātapāḥ) - the great ascetic (Śamīka - or the king himself, depending on interpretation, here probably referring to the sage Śamīka whose tapas was insulted) (one of great austerity, a great ascetic)

(adjective)

Nominative, masculine, singular of mahātapas

mahātapas - one of great austerity, a great ascetic

Compound type : bahuvrīhi (mahat+tapas)

• mahat – great, large, mighty, extensive
  adjective
• tapas – austerity, penance, religious meditation
  noun (neuter)
  Root: tap (class 1)

Note: Refers to Śamīka here, implying the king regretted his action against such a revered sage.