महाभारतः mahābhārataḥ - book-14, chapter-27, verse-16

प्रतिज्ञावृक्षमफलं शान्तिच्छायासमन्वितम् ।
ज्ञानाश्रयं तृप्तितोयमन्तःक्षेत्रज्ञभास्करम् ॥१६॥

16. pratijñāvṛkṣamaphalaṁ śānticchāyāsamanvitam ,
jñānāśrayaṁ tṛptitoyamantaḥkṣetrajñabhāskaram.

16. pratijñā-vṛkṣa-aphalam śānti-cchāyā-samanvitam
jñāna-āśrayam tṛpti-toyam-antaḥ-kṣetrajña-bhāskaram

16. (idam vanam) pratijñā-vṛkṣa-aphalam (asti).
(idam) śānti-cchāyā-samanvitam (asti).
(idam) jñāna-āśrayam (asti).
(idam) tṛpti-toyam-antaḥ-kṣetrajña-bhāskaram (ca asti).

16. (It is) a forest like a tree of vows that yields no fruit, endowed with the shade of peace, a refuge of knowledge, having the water of contentment, and the inner knower (kṣetrajña) as its sun.

Words meanings summery:

• प्रतिज्ञा-वृक्ष-अफलम् (pratijñā-vṛkṣa-aphalam) - referring to actions performed without attachment to their results (karma yoga) (a tree of vows that is fruitless, a tree of commitment without desired results)

• शान्ति-च्छाया-समन्वितम् (śānti-cchāyā-samanvitam) - endowed with the shade of peace, accompanied by the shadow of tranquility

• ज्ञान-आश्रयम् (jñāna-āśrayam) - a refuge of knowledge, a support of wisdom

• तृप्ति-तोयम्-अन्तः-क्षेत्रज्ञ-भास्करम् (tṛpti-toyam-antaḥ-kṣetrajña-bhāskaram) - having satisfaction as its water and the inner knower as its sun

Words meanings and morphology

प्रतिज्ञा-वृक्ष-अफलम् (pratijñā-vṛkṣa-aphalam) - referring to actions performed without attachment to their results (karma yoga) (a tree of vows that is fruitless, a tree of commitment without desired results)

(adjective)

Accusative, neuter, singular of pratijñā-vṛkṣa-aphala

pratijñā-vṛkṣa-aphala - a tree of vows (or commitments) without fruit/result

Compound type : bahuvrihi (pratijñā-vṛkṣa+aphala)

• pratijñā-vṛkṣa – tree of vows/commitments
  noun (masculine)
• aphala – fruitless, without result, ineffective
  adjective (neuter)
  Compound of a- (negative) and phala (fruit).
  Prefix: a

Note: A complex compound describing the nature of the forest allegorically.

शान्ति-च्छाया-समन्वितम् (śānti-cchāyā-samanvitam) - endowed with the shade of peace, accompanied by the shadow of tranquility

(adjective)

Accusative, neuter, singular of śānti-cchāyā-samanvita

śānti-cchāyā-samanvita - endowed with the shade of peace

Compound type : bahuvrihi (śānti-cchāyā+samanvita)

• śānti-cchāyā – shade of peace, shadow of tranquility
  noun (feminine)
• samanvita – endowed with, accompanied by, possessed of
  adjective (neuter)
  Past Passive Participle
  Derived from sam-anu-√i (to go with, follow).
  Prefixes: sam+anu
  Root: i (class 2)

Note: Describes the peaceful atmosphere or nature of the forest.

ज्ञान-आश्रयम् (jñāna-āśrayam) - a refuge of knowledge, a support of wisdom

(noun)

Accusative, neuter, singular of jñāna-āśraya

jñāna-āśraya - refuge of knowledge, support of wisdom

Compound type : tatpuruṣa (jñāna+āśraya)

• jñāna – knowledge, wisdom, spiritual knowledge
  noun (neuter)
  Derived from root √jñā (to know).
  Root: jñā (class 9)
• āśraya – refuge, shelter, support, dwelling place
  noun (masculine)
  Derived from root √śri (to resort to, lean on) with prefix ā-.
  Prefix: ā
  Root: śri (class 1)

Note: Describes the essence of the forest as a source of wisdom.

तृप्ति-तोयम्-अन्तः-क्षेत्रज्ञ-भास्करम् (tṛpti-toyam-antaḥ-kṣetrajña-bhāskaram) - having satisfaction as its water and the inner knower as its sun

(adjective)

Accusative, neuter, singular of tṛpti-toya-antaḥ-kṣetrajña-bhāskara

tṛpti-toya-antaḥ-kṣetrajña-bhāskara - having satisfaction as its water, and the inner knower as its sun

Compound type : bahuvrihi (tṛpti-toya+antaḥ-kṣetrajña-bhāskara)

• tṛpti-toya – water of satisfaction, having satisfaction as water
  noun (neuter)
• antaḥ-kṣetrajña-bhāskara – having the inner knower as its sun
  adjective (masculine)

Note: This entire long compound functions as an adjective describing the spiritual attributes of the forest.