महाभारतः mahābhārataḥ - book-1, chapter-13, verse-27

एवं दारक्रियाहेतोः प्रयतिष्ये पितामहाः ।
अनेन विधिना शश्वन्न करिष्येऽहमन्यथा ॥२७॥

27. evaṁ dārakriyāhetoḥ prayatiṣye pitāmahāḥ ,
anena vidhinā śaśvanna kariṣye'hamanyathā.

27. evam dārakriyāhetoḥ prayatiṣye pitāmahāḥ
anena vidhinā śaśvat na kariṣye aham anyathā

27. Thus, O grandfathers, I will strive for the sake of marriage by this method. I will always do so and never otherwise.

Words meanings summery:

• एवम् (evam) - thus (thus, in this way)

• दारक्रियाहेतोः (dārakriyāhetoḥ) - for the sake of marriage (for the sake of marriage (literally, action of marriage))

• प्रयतिष्ये (prayatiṣye) - I will strive (I will strive, I will endeavor)

• पितामहाः (pitāmahāḥ) - O grandfathers (addressing ancestors) (grandfathers, ancestors)

• अनेन (anena) - by this (by this, with this)

• विधिना (vidhinā) - by this method (by method, according to rule)

• शश्वत् (śaśvat) - always, never (with `na`) (always, constantly, forever)

• न (na) - not (not, no)

• करिष्ये (kariṣye) - I will do (I will do, I will make)

• अहम् (aham) - I

• अन्यथा (anyathā) - otherwise (otherwise, in a different manner)

Words meanings and morphology

एवम् (evam) - thus (thus, in this way)

(indeclinable)

दारक्रियाहेतोः (dārakriyāhetoḥ) - for the sake of marriage (for the sake of marriage (literally, action of marriage))

(noun)

Genitive, masculine, singular of dārakriyāhetu

dārakriyāhetu - reason/cause for the act of marriage

Compound type : tatpuruṣa (dāra+kriyā+hetu)

• dāra – wife, spouses (usually plural)
  noun (masculine)
• kriyā – action, deed, rite
  noun (feminine)
  action noun
  from √kṛ
  Root: kṛ (class 8)
• hetu – cause, reason, sake
  noun (masculine)

Note: Ablative/Genitive singular of dārakriyāhetu

प्रयतिष्ये (prayatiṣye) - I will strive (I will strive, I will endeavor)

(verb)

1st person , singular, middle, future (lṛṭ) of √yat

Prefix: pra

Root: yat (class 1)

Note: Ātmanepada future 1st person singular

पितामहाः (pitāmahāḥ) - O grandfathers (addressing ancestors) (grandfathers, ancestors)

(noun)

Vocative, masculine, plural of pitāmaha

pitāmaha - paternal grandfather, ancestor

Note: Also nominative plural, but vocative fits the context of addressing ancestors.

अनेन (anena) - by this (by this, with this)

(pronoun)

Instrumental, masculine, singular of idam

idam - this, this one

Note: Instrumental singular, masculine/neuter

विधिना (vidhinā) - by this method (by method, according to rule)

(noun)

Instrumental, masculine, singular of vidhi

vidhi - rule, method, rite, ordinance

शश्वत् (śaśvat) - always, never (with `na`) (always, constantly, forever)

(indeclinable)

न (na) - not (not, no)

(indeclinable)

करिष्ये (kariṣye) - I will do (I will do, I will make)

(verb)

1st person , singular, middle, future (lṛṭ) of √kṛ

Root: kṛ (class 8)

Note: Ātmanepada future 1st person singular

अहम् (aham) - I

(pronoun)

Nominative, singular of aham

aham - I

अन्यथा (anyathā) - otherwise (otherwise, in a different manner)

(indeclinable)