महाभारतः mahābhārataḥ - book-3, chapter-19, verse-9

आयुष्मंस्त्वं मया नित्यं रक्षितव्यस्त्वयाप्यहम् ।
रक्षितव्यो रथी नित्यमिति कृत्वापयाम्यहम् ॥९॥

9. āyuṣmaṁstvaṁ mayā nityaṁ rakṣitavyastvayāpyaham ,
rakṣitavyo rathī nityamiti kṛtvāpayāmyaham.

9. āyuṣman tvam mayā nityam rakṣitavyaḥ tvayā api aham
| rakṣitavyaḥ rathī nityam iti kṛtvā apayāmi aham

9. O long-lived one, you must always be protected by me, and I must also be protected by you. The warrior on the chariot (rathī) must always be protected; holding this in mind, I retreat.

Words meanings summery:

• आयुष्मन् (āyuṣman) - O Pradyumna (O long-lived one, O possessor of long life)

• त्वम् (tvam) - you

• मया (mayā) - by me

• नित्यम् (nityam) - always, constantly, perpetually

• रक्षितव्यः (rakṣitavyaḥ) - to be protected, ought to be protected

• त्वया (tvayā) - by you

• अपि (api) - also, even

• अहम् (aham) - I

• रक्षितव्यः (rakṣitavyaḥ) - to be protected, ought to be protected

• रथी (rathī) - the warrior (Pradyumna) on the chariot (a warrior on a chariot, one who has a chariot)

• नित्यम् (nityam) - always, constantly, perpetually

• इति (iti) - thus, so, in this manner

• कृत्वा (kṛtvā) - having done, having made, having considered

• अपयामि (apayāmi) - I retreat, I go away, I depart

• अहम् (aham) - I

Words meanings and morphology

आयुष्मन् (āyuṣman) - O Pradyumna (O long-lived one, O possessor of long life)

(adjective)

Vocative, masculine, singular of āyuṣmat

āyuṣmat - long-lived, possessing life, vigorous

त्वम् (tvam) - you

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you (singular/plural)

मया (mayā) - by me

(pronoun)

Instrumental, singular of mad

mad - I, me

नित्यम् (nityam) - always, constantly, perpetually

(indeclinable)

रक्षितव्यः (rakṣitavyaḥ) - to be protected, ought to be protected

(adjective)

Nominative, masculine, singular of rakṣitavya

rakṣitavya - to be protected, fit to be guarded, protectable

Gerundive

Root 'rakṣ' (1st class) + 'tavya' suffix

Root: rakṣ (class 1)

त्वया (tvayā) - by you

(pronoun)

Instrumental, singular of yuṣmad

yuṣmad - you (singular/plural)

अपि (api) - also, even

(indeclinable)

अहम् (aham) - I

(pronoun)

Nominative, singular of mad

mad - I, me

रक्षितव्यः (rakṣitavyaḥ) - to be protected, ought to be protected

(adjective)

Nominative, masculine, singular of rakṣitavya

rakṣitavya - to be protected, fit to be guarded, protectable

Gerundive

Root 'rakṣ' (1st class) + 'tavya' suffix

Root: rakṣ (class 1)

रथी (rathī) - the warrior (Pradyumna) on the chariot (a warrior on a chariot, one who has a chariot)

(noun)

Nominative, masculine, singular of rathin

rathin - one who possesses a chariot, a charioteer, a warrior in a chariot

नित्यम् (nityam) - always, constantly, perpetually

(indeclinable)

इति (iti) - thus, so, in this manner

(indeclinable)

कृत्वा (kṛtvā) - having done, having made, having considered

(indeclinable)

Absolutive (Gerund)

Root 'kṛ' (8th class) + 'tvā' suffix

Root: kṛ (class 8)

अपयामि (apayāmi) - I retreat, I go away, I depart

(verb)

1st person , singular, active, present (laṭ) of apayā

Root 'yā' (2nd class) with upasarga 'apa'

Prefix: apa

Root: yā (class 2)

अहम् (aham) - I

(pronoun)

Nominative, singular of mad

mad - I, me