महाभारतः mahābhārataḥ - book-7, chapter-134, verse-46

तौ परस्परमासाद्य शरवर्षेण पार्थिव ।
छादयेतां महेष्वासौ कृतप्रतिकृतैषिणौ ॥४६॥

46. tau parasparamāsādya śaravarṣeṇa pārthiva ,
chādayetāṁ maheṣvāsau kṛtapratikṛtaiṣiṇau.

46. tau parasparam āsādya śaravarṣeṇa pārthiva
| chādayetām maheṣvāsau kṛtapratikṛtaiṣiṇau

46. pārthiva kṛtapratikṛtaiṣiṇau tau maheṣvāsau
parasparam āsādya śaravarṣeṇa chādayetām

46. O King, those two great archers, seeking to repay deed for deed, having come face to face, covered each other with showers of arrows.

Words meanings summery:

• तौ (tau) - Karna and Arjuna (those two, they two)

• परस्परम् (parasparam) - mutually, each other, reciprocally

• आसाद्य (āsādya) - having approached, having reached, having attacked

• शरवर्षेण (śaravarṣeṇa) - by a shower of arrows, with a rain of arrows

• पार्थिव (pārthiva) - O Dhritarashtra or Janamejaya (O king, O ruler, O earthly one)

• छादयेताम् (chādayetām) - they (two) covered

• महेष्वासौ (maheṣvāsau) - Karna and Arjuna (two great archers, two mighty bowmen)

• कृतप्रतिकृतैषिणौ (kṛtapratikṛtaiṣiṇau) - Karna and Arjuna, seeking to repay each other's actions in battle. (those two seeking deed for deed, seeking retaliation)

Words meanings and morphology

तौ (tau) - Karna and Arjuna (those two, they two)

(pronoun)

Nominative, masculine, dual of tad

tad - that, it, he, she

Note: Masculine nominative/accusative dual form of 'tad'.

परस्परम् (parasparam) - mutually, each other, reciprocally

(indeclinable)

Note: Accusative singular neuter of 'paraspara', used adverbially.

आसाद्य (āsādya) - having approached, having reached, having attacked

(indeclinable)

Absolutive (Gerund)

Derived from root √sad (to sit, to go) with prefix ā.

Prefix: ā

Root: sad (class 1)

शरवर्षेण (śaravarṣeṇa) - by a shower of arrows, with a rain of arrows

(noun)

Instrumental, neuter, singular of śaravarṣa

śaravarṣa - shower of arrows, rain of arrows

Compound type : tatpuruṣa (śara+varṣa)

• śara – arrow
  noun (masculine)
• varṣa – rain, shower
  noun (neuter)
  Root: vṛṣ (class 1)

पार्थिव (pārthiva) - O Dhritarashtra or Janamejaya (O king, O ruler, O earthly one)

(noun)

Vocative, masculine, singular of pārthiva

pārthiva - earthly, king, ruler, prince

Derived from pṛthivī (earth).

छादयेताम् (chādayetām) - they (two) covered

(verb)

3rd person , dual, active, past imperfect (laṅ) of chāday

Causative from root √chad.

Causal of √chad.

Root: chad (class 1)

महेष्वासौ (maheṣvāsau) - Karna and Arjuna (two great archers, two mighty bowmen)

(noun)

Nominative, masculine, dual of maheṣvāsa

maheṣvāsa - great archer, mighty bowman

Compound type : bahuvrīhi (mahā+iṣvāsa)

• mahā – great, mighty
  adjective
  From 'mahat'.
• iṣvāsa – bowman, archer
  noun (masculine)

कृतप्रतिकृतैषिणौ (kṛtapratikṛtaiṣiṇau) - Karna and Arjuna, seeking to repay each other's actions in battle. (those two seeking deed for deed, seeking retaliation)

(adjective)

Nominative, masculine, dual of kṛtapratikṛtaiṣin

kṛtapratikṛtaiṣin - desirous of retaliation, seeking deed for deed

Compound ending in -eṣin (desirous of), itself derived from root √iṣ (to desire) with compound 'kṛtapratikṛta'.

Compound type : tatpuruṣa (kṛta+pratikṛta+eṣin)

• kṛta – done, made, deed
  adjective (neuter)
  Past Passive Participle
  From root √kṛ (to do, to make)
  Root: kṛ (class 8)
• pratikṛta – retaliation, return action
  noun (neuter)
  Past Passive Participle
  From root √kṛ (to do) with prefix prati (in return)
  Prefix: prati
  Root: kṛ (class 8)
• eṣin – desiring, wishing, seeking
  adjective (masculine)
  From root √iṣ (to desire)
  Root: iṣ (class 6)

Note: Agreeing with 'tau maheṣvāsau'.