महाभारतः mahābhārataḥ - book-7, chapter-66, verse-9

ततोऽर्जुनः शरव्रातान्द्रोणस्यावार्य सायकैः ।
द्रोणमभ्यर्दयद्बाणैर्घोररूपैर्महत्तरैः ॥९॥

9. tato'rjunaḥ śaravrātāndroṇasyāvārya sāyakaiḥ ,
droṇamabhyardayadbāṇairghorarūpairmahattaraiḥ.

9. tataḥ arjunaḥ śaravrātan droṇasya avārya sāyakaiḥ
droṇam abhyardayat bāṇaiḥ ghorarūpaiḥ mahattaraiḥ

9. tataḥ arjunaḥ droṇasya śaravrātan sāyakaiḥ avārya
droṇam ghorarūpaiḥ mahattaraiḥ bāṇaiḥ abhyardayat

9. Then Arjuna, having fended off Drona's volleys of arrows with his own shafts, attacked Drona with powerful and formidable arrows.

Words meanings summery:

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

• अर्जुनः (arjunaḥ) - Arjuna (name of the Pandava prince)

• शरव्रातन् (śaravrātan) - the multitudes of arrows, the showers of arrows

• द्रोणस्य (droṇasya) - of Drona, the teacher (guru) (of Drona)

• अवार्य (avārya) - having warded off, having averted

• सायकैः (sāyakaiḥ) - with his own arrows (with arrows, with shafts)

• द्रोणम् (droṇam) - Drona, the teacher (guru) (Drona)

• अभ्यर्दयत् (abhyardayat) - he afflicted, he attacked, he tormented

• बाणैः (bāṇaiḥ) - with arrows, with shafts

• घोररूपैः (ghorarūpaiḥ) - with arrows of formidable appearance (with terrible forms, formidable)

• महत्तरैः (mahattaraiḥ) - with mightier arrows (with greater, mightier (arrows))

Words meanings and morphology

ततः (tataḥ) - then, thereafter, from there

(indeclinable)

अर्जुनः (arjunaḥ) - Arjuna (name of the Pandava prince)

(proper noun)

Nominative, masculine, singular of arjuna

arjuna - Arjuna (name), white, silver, clear

शरव्रातन् (śaravrātan) - the multitudes of arrows, the showers of arrows

(noun)

Accusative, masculine, plural of śaravrāta

śaravrāta - multitude/cluster of arrows, volley of arrows

Compound type : tatpuruṣa (śara+vrāta)

• śara – arrow, reed
  noun (masculine)
• vrāta – multitude, host, flock, band
  noun (masculine)

द्रोणस्य (droṇasya) - of Drona, the teacher (guru) (of Drona)

(proper noun)

Genitive, masculine, singular of droṇa

droṇa - Drona (name of a teacher/preceptor), a measure, a vessel

अवार्य (avārya) - having warded off, having averted

(indeclinable)

absolutive

Prefix: ava

Root: vṛ (class 5)

सायकैः (sāyakaiḥ) - with his own arrows (with arrows, with shafts)

(noun)

Instrumental, masculine, plural of sāyaka

sāyaka - arrow, dart, missile

द्रोणम् (droṇam) - Drona, the teacher (guru) (Drona)

(proper noun)

Accusative, masculine, singular of droṇa

droṇa - Drona (name of a teacher/preceptor), a measure, a vessel

अभ्यर्दयत् (abhyardayat) - he afflicted, he attacked, he tormented

(verb)

3rd person , singular, active, imperfect (laṅ) of abhyard

Prefix: abhi

Root: ṛd (class 1)

बाणैः (bāṇaiḥ) - with arrows, with shafts

(noun)

Instrumental, masculine, plural of bāṇa

bāṇa - arrow, shaft, dart

घोररूपैः (ghorarūpaiḥ) - with arrows of formidable appearance (with terrible forms, formidable)

(adjective)

Instrumental, masculine, plural of ghorarūpa

ghorarūpa - having a terrible form, formidable, dreadful-looking

Compound type : bahuvrīhi (ghora+rūpa)

• ghora – terrible, dreadful, awful, formidable
  adjective (masculine)
• rūpa – form, shape, appearance, beauty
  noun (neuter)

Note: Adjective modifying 'bāṇaiḥ'

महत्तरैः (mahattaraiḥ) - with mightier arrows (with greater, mightier (arrows))

(adjective)

Instrumental, masculine, plural of mahattara

mahattara - greater, mightier, more extensive

comparative degree of 'mahat' (great)

Note: Adjective modifying 'bāṇaiḥ'