महाभारतः mahābhārataḥ - book-1, chapter-46, verse-8

शशापाथ स तच्छ्रुत्वा पितरं ते रुषान्वितः ।
ऋषेः पुत्रो महातेजा बालोऽपि स्थविरैर्वरः ॥८॥

8. śaśāpātha sa tacchrutvā pitaraṁ te ruṣānvitaḥ ,
ṛṣeḥ putro mahātejā bālo'pi sthavirairvaraḥ.

8. śaśāpa atha saḥ tat śrutvā pitaraṃ te ruṣā-anvitaḥ
ṛṣeḥ putraḥ mahā-tejāḥ bālaḥ api sthaviraiḥ varaḥ

8. Then, upon hearing that, the sage's son, who, though a boy, possessed great spiritual power and was considered superior even by elders, became filled with anger and cursed your father.

Words meanings summery:

• शशाप (śaśāpa) - cursed, swore

• अथ (atha) - then, thereupon, now

• सः (saḥ) - the sage's son (he, that)

• तत् (tat) - that news (about the dead snake) (that, it)

• श्रुत्वा (śrutvā) - having heard

• पितरं (pitaraṁ) - your father (King Parikshit) (father)

• ते (te) - refers to Janamejaya, to whom the story is being told (your, of you)

• रुषा-अन्वितः (ruṣā-anvitaḥ) - filled with anger, enraged

• ऋषेः (ṛṣeḥ) - of the sage Śamika (of the sage)

• पुत्रः (putraḥ) - Śṛṅgin, son of Śamika (son)

• महा-तेजाः (mahā-tejāḥ) - possessing great spiritual power (greatly powerful, highly energetic)

• बालः (bālaḥ) - though young in age (a boy, young)

• अपि (api) - even, also, too

• स्थविरैः (sthaviraiḥ) - by the elders

• वरः (varaḥ) - superior in spiritual power/virtue (superior, best, excellent)

Words meanings and morphology

शशाप (śaśāpa) - cursed, swore

(verb)

3rd person , singular, active, past perfect (liṭ) of śap

Root: śap (class 1)

अथ (atha) - then, thereupon, now

(indeclinable)

सः (saḥ) - the sage's son (he, that)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

तत् (tat) - that news (about the dead snake) (that, it)

(pronoun)

Accusative, neuter, singular of tad

tad - that, he, she, it

श्रुत्वा (śrutvā) - having heard

(indeclinable)

absolutive

ktvā suffix

Root: śru (class 5)

पितरं (pitaraṁ) - your father (King Parikshit) (father)

(noun)

Accusative, masculine, singular of pitṛ

pitṛ - father, ancestor

ते (te) - refers to Janamejaya, to whom the story is being told (your, of you)

(pronoun)

Genitive, singular of yuṣmad

yuṣmad - you (pronoun)

रुषा-अन्वितः (ruṣā-anvitaḥ) - filled with anger, enraged

(adjective)

Nominative, masculine, singular of ruṣā-anvita

ruṣā-anvita - filled with anger

Compound type : tatpuruṣa (ruṣā+anvita)

• ruṣā – with anger (instrumental of ruṣ)
  noun (feminine)
• anvita – accompanied, connected, endowed with, filled with
  adjective
  past participle
  an+√i + kta
  Prefix: anu
  Root: i (class 2)

ऋषेः (ṛṣeḥ) - of the sage Śamika (of the sage)

(noun)

Genitive, masculine, singular of ṛṣi

ṛṣi - sage, seer

पुत्रः (putraḥ) - Śṛṅgin, son of Śamika (son)

(noun)

Nominative, masculine, singular of putra

putra - son

महा-तेजाः (mahā-tejāḥ) - possessing great spiritual power (greatly powerful, highly energetic)

(adjective)

Nominative, masculine, singular of mahā-tejas

mahā-tejas - of great brilliance/power, greatly energetic

Compound type : bahuvrīhi (mahā+tejas)

• mahā – great, large
  adjective
• tejas – brilliance, power, energy, spiritual energy
  noun (neuter)

बालः (bālaḥ) - though young in age (a boy, young)

(noun)

Nominative, masculine, singular of bāla

bāla - child, boy, young, ignorant

अपि (api) - even, also, too

(indeclinable)

स्थविरैः (sthaviraiḥ) - by the elders

(noun)

Instrumental, masculine, plural of sthavira

sthavira - old, aged, an old man, elder

वरः (varaḥ) - superior in spiritual power/virtue (superior, best, excellent)

(adjective)

Nominative, masculine, singular of vara

vara - excellent, best, noble, superior, a boon, a choice