महाभारतः mahābhārataḥ - book-8, chapter-9, verse-15

वार्यमाणौ ततस्तौ तु शैनेयशरवृष्टिभिः ।
शैनेयस्य रथं तूर्णं छादयामासतुः शरैः ॥१५॥

15. vāryamāṇau tatastau tu śaineyaśaravṛṣṭibhiḥ ,
śaineyasya rathaṁ tūrṇaṁ chādayāmāsatuḥ śaraiḥ.

15. vāryamāṇau tataḥ tau tu śaineyaśaravṛṣṭibhiḥ
śaineyasya ratham tūrṇam chādayāmāsatuḥ śaraiḥ

15. tataḥ tu śaineyaśaravṛṣṭibhiḥ vāryamāṇau tau
śaineyasya ratham śaraiḥ tūrṇam chādayāmāsatuḥ

15. Although those two were being restrained by showers of arrows from Shaineya (Satyaki), they quickly covered Shaineya's chariot with their own arrows.

Words meanings summery:

• वार्यमाणौ (vāryamāṇau) - being restrained (being warded off, being stopped, being prevented)

• ततः (tataḥ) - then (then, therefrom, afterwards)

• तौ (tau) - the two warriors (presumably the same two as in the previous verse) (those two)

• तु (tu) - although, but (but, indeed, on the other hand)

• शैनेयशरवृष्टिभिः (śaineyaśaravṛṣṭibhiḥ) - by showers of arrows from Shaineya

• शैनेयस्य (śaineyasya) - of Shaineya (Satyaki)

• रथम् (ratham) - chariot

• तूर्णम् (tūrṇam) - quickly, swiftly

• छादयामासतुः (chādayāmāsatuḥ) - they two covered, they two overwhelmed

• शरैः (śaraiḥ) - with arrows

Words meanings and morphology

वार्यमाणौ (vāryamāṇau) - being restrained (being warded off, being stopped, being prevented)

(adjective)

Nominative, masculine, dual of vāryamāṇa

vāryamāṇa - being stopped, being warded off

present passive participle

Derived from the causative stem of root √vṛ (to choose, cover, stop) + śānac suffix.

Root: vṛ (class 5)

Note: Qualifies "tau".

ततः (tataḥ) - then (then, therefrom, afterwards)

(indeclinable)

Note: Adverb of sequence.

तौ (tau) - the two warriors (presumably the same two as in the previous verse) (those two)

(pronoun)

Nominative, masculine, dual of tad

tad - that, he, she, it

Note: Subject of "chādayāmāsatuḥ".

तु (tu) - although, but (but, indeed, on the other hand)

(indeclinable)

Note: Indicates a contrast or emphasis.

शैनेयशरवृष्टिभिः (śaineyaśaravṛṣṭibhiḥ) - by showers of arrows from Shaineya

(noun)

Instrumental, feminine, plural of śaineyaśaravṛṣṭi

śaineyaśaravṛṣṭi - rain of arrows from Shaineya

Compound type : tatpuruṣa (śaineya+śaravṛṣṭi)

• śaineya – son of Śini, a name for Satyaki
  proper noun (masculine)
• śaravṛṣṭi – rain of arrows
  noun (feminine)

Note: Agent of the passive participle "vāryamāṇau".

शैनेयस्य (śaineyasya) - of Shaineya (Satyaki)

(proper noun)

Genitive, masculine, singular of śaineya

śaineya - son of Śini, a name for Satyaki

Note: Possessive, "Shaineya's chariot".

रथम् (ratham) - chariot

(noun)

Accusative, masculine, singular of ratha

ratha - chariot

Note: Object of "chādayāmāsatuḥ".

तूर्णम् (tūrṇam) - quickly, swiftly

(indeclinable)

past passive participle

Derived from root √tvar (to hurry). Used here adverbially.

Root: tvar (class 1)

Note: Adverb modifying "chādayāmāsatuḥ".

छादयामासतुः (chādayāmāsatuḥ) - they two covered, they two overwhelmed

(verb)

3rd person , dual, active, perfect (lit) of chādayāmāsa

perfect (ām-pratyaya)

Periphrastic perfect form, 3rd dual, from the causative stem of √chad (to cover) with auxiliary √as.

Root: chad (class 10)

Note: The subject is "tau".

शरैः (śaraiḥ) - with arrows

(noun)

Instrumental, masculine, plural of śara

śara - arrow

Note: Means by which they covered the chariot.