महाभारतः mahābhārataḥ - book-15, chapter-26, verse-15

द्वैपायनप्रसादाच्च त्वमपीदं तपोवनम् ।
राजन्नवाप्य दुष्प्रापां सिद्धिमग्र्यां गमिष्यसि ॥१५॥

15. dvaipāyanaprasādācca tvamapīdaṁ tapovanam ,
rājannavāpya duṣprāpāṁ siddhimagryāṁ gamiṣyasi.

15. dvaipāyanaprasādāt ca tvam api idam tapovanam
rājan avāpya duṣprāpām agryām siddhim gamiṣyasi

15. rājan dvaipāyanaprasādāt ca tvam api idam
tapovanam avāpya duṣprāpām agryām siddhim gamiṣyasi

15. O king, by the grace of Dvaipāyana (Vyāsa), you will also attain supreme perfection (siddhi), which is difficult to achieve, after arriving at this hermitage.

Words meanings summery:

• द्वैपायनप्रसादात् (dvaipāyanaprasādāt) - by the grace of Dvaipāyana

• च (ca) - and

• त्वम् (tvam) - you

• अपि (api) - also, even

• इदम् (idam) - this

• तपोवनम् (tapovanam) - hermitage, forest of austerities

• राजन् (rājan) - O king

• अवाप्य (avāpya) - having obtained, having reached

• दुष्प्रापाम् (duṣprāpām) - difficult to obtain, hard to reach

• अग्र्याम् (agryām) - excellent, foremost, supreme

• सिद्धिम् (siddhim) - supreme perfection (perfection, attainment, success)

• गमिष्यसि (gamiṣyasi) - you will go, you will attain

Words meanings and morphology

द्वैपायनप्रसादात् (dvaipāyanaprasādāt) - by the grace of Dvaipāyana

(noun)

Ablative, masculine, singular of dvaipāyanaprasāda

dvaipāyanaprasāda - grace or favor of Dvaipāyana (Vyāsa)

Compound type : tatpuruṣa (dvaipāyana+prasāda)

• dvaipāyana – Dvaipāyana (Vyāsa), literally 'island-born'
  proper noun (masculine)
• prasāda – grace, favor, blessing, clarity
  noun (masculine)
  Prefix: pra

च (ca) - and

(indeclinable)

त्वम् (tvam) - you

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you

अपि (api) - also, even

(indeclinable)

इदम् (idam) - this

(pronoun)

Accusative, neuter, singular of idam

idam - this, this here

तपोवनम् (tapovanam) - hermitage, forest of austerities

(noun)

Accusative, neuter, singular of tapovana

tapovana - hermitage, sacred grove, forest for ascetic practices

Compound type : tatpuruṣa (tapas+vana)

• tapas – penance, austerity, spiritual fervor
  noun (neuter)
• vana – forest, grove, wood
  noun (neuter)

राजन् (rājan) - O king

(noun)

Vocative, masculine, singular of rājan

rājan - king, ruler, sovereign

अवाप्य (avāpya) - having obtained, having reached

(indeclinable)

absolutive

Derived from root āp with prefix ava, forming an indeclinable past participle (absolutive/gerund).

Prefix: ava

Root: āp (class 5)

दुष्प्रापाम् (duṣprāpām) - difficult to obtain, hard to reach

(adjective)

Accusative, feminine, singular of duṣprāpa

duṣprāpa - difficult to obtain, hard to reach or attain

Compound type : bahuvrīhi (dus+prāpa)

• dus – bad, ill, difficult, hard (as a prefix)
  indeclinable
• prāpa – obtainable, attainable
  adjective (masculine)
  gerundive
  Derived from root āp (to obtain) with prefix pra, and suffix -a.
  Prefix: pra
  Root: āp (class 5)

अग्र्याम् (agryām) - excellent, foremost, supreme

(adjective)

Accusative, feminine, singular of agrya

agrya - foremost, chief, excellent, best

सिद्धिम् (siddhim) - supreme perfection (perfection, attainment, success)

(noun)

Accusative, feminine, singular of siddhi

siddhi - perfection, accomplishment, success, magical power

Root: sidh (class 1)

गमिष्यसि (gamiṣyasi) - you will go, you will attain

(verb)

2nd person , singular, active, future (lṛṭ) of gam

future active

Future tense, 2nd person singular, active voice (lṛṭ-lakāra).

Root: gam (class 1)