वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-7, chapter-17, verse-15

अहं प्रेतगतस्यापि करिष्ये काङ्क्षितं पितुः ।
इति प्रतिज्ञामारुह्य चरामि विपुलं तपः ॥१५॥

15. ahaṃ pretagatasyāpi kariṣye kāṅkṣitaṃ pituḥ ,
iti pratijñāmāruhya carāmi vipulaṃ tapaḥ.

15. aham pretagatasya api kariṣye kāṅkṣitam pituḥ
iti pratijñām āruhya carāmi vipulam tapaḥ

15. I shall fulfill my father's wish, even for the deceased. Having undertaken this vow, I practice great austerity (tapas).

Words meanings summery:

• अहम् (aham) - I

• प्रेतगतस्य (pretagatasya) - of the one who has gone to the world of the dead, of the deceased

• अपि (api) - even, also, too

• करिष्ये (kariṣye) - I shall do, I shall perform

• काङ्क्षितम् (kāṅkṣitam) - desired, wished, what is longed for, wish

• पितुः (pituḥ) - of the father

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

• प्रतिज्ञाम् (pratijñām) - vow, promise, declaration

• आरुह्य (āruhya) - having ascended, having undertaken, having mounted

• चरामि (carāmi) - I practice, I perform, I move

• विपुलम् (vipulam) - great, extensive, large

• तपः (tapaḥ) - austerity, penance, heat

Words meanings and morphology

अहम् (aham) - I

(pronoun)

Nominative, singular of aham

aham - I, ego

प्रेतगतस्य (pretagatasya) - of the one who has gone to the world of the dead, of the deceased

(adjective)

Genitive, masculine, singular of pretagata

pretagata - gone to the dead, deceased, departed

Past Passive Participle

Compound of 'preta' (departed) and 'gata' (gone), from pra-√i + √gam

Compound type : tatpuruṣa (preta+gata)

• preta – departed, deceased, ghost
  noun (masculine)
  Prefix: pra
  Root: i (class 2)
• gata – gone, arrived, passed
  adjective (masculine)
  Past Passive Participle
  From root √gam (to go)
  Root: gam (class 1)

अपि (api) - even, also, too

(indeclinable)

करिष्ये (kariṣye) - I shall do, I shall perform

(verb)

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

Root: kṛ (class 8)

काङ्क्षितम् (kāṅkṣitam) - desired, wished, what is longed for, wish

(noun)

Accusative, neuter, singular of kāṅkṣita

kāṅkṣita - desired, wished for, longing, object of desire

Past Passive Participle

From root √kāṅkṣ (to desire)

Root: kāṅkṣ (class 10)

पितुः (pituḥ) - of the father

(noun)

Genitive, masculine, singular of pitṛ

pitṛ - father

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

(indeclinable)

प्रतिज्ञाम् (pratijñām) - vow, promise, declaration

(noun)

Accusative, feminine, singular of pratijñā

pratijñā - vow, promise, agreement, declaration

Prefix: prati

Root: jñā (class 9)

आरुह्य (āruhya) - having ascended, having undertaken, having mounted

(indeclinable)

absolutive

From ā- + √ruh (to ascend)

Prefix: ā

Root: ruh (class 1)

चरामि (carāmi) - I practice, I perform, I move

(verb)

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

Root: car (class 1)

विपुलम् (vipulam) - great, extensive, large

(adjective)

Accusative, neuter, singular of vipula

vipula - vast, extensive, great, large

तपः (tapaḥ) - austerity, penance, heat

(noun)

Accusative, neuter, singular of tapas

tapas - austerity, penance, heat, spiritual fervor