महाभारतः mahābhārataḥ - book-5, chapter-127, verse-25

इन्द्रियाणि महत्प्रेप्सुर्नियच्छेदर्थधर्मयोः ।
इन्द्रियैर्नियतैर्बुद्धिर्वर्धतेऽग्निरिवेन्धनैः ॥२५॥

25. indriyāṇi mahatprepsurniyacchedarthadharmayoḥ ,
indriyairniyatairbuddhirvardhate'gnirivendhanaiḥ.

25. indriyāṇi mahat-prepsuḥ niyacchet artha-dharmayoḥ
indriyaiḥ niyataiḥ buddhiḥ vardhate agniḥ iva indhanaiḥ

25. mahat-prepsuḥ indriyāṇi artha-dharmayoḥ niyacchet
niyataiḥ indriyaiḥ buddhiḥ vardhate agniḥ iva indhanaiḥ

25. A person desiring great things should restrain their senses in matters of wealth and natural law (dharma). When the senses are controlled, the intellect (buddhi) grows, just as fire increases with fuel.

Words meanings summery:

• इन्द्रियाणि (indriyāṇi) - senses, organs of sense

• महत्-प्रेप्सुः (mahat-prepsuḥ) - one who desires great things

• नियच्छेत् (niyacchet) - one should restrain/control

• अर्थ-धर्मयोः (artha-dharmayoḥ) - in matters of wealth and natural law (dharma)

• इन्द्रियैः (indriyaiḥ) - by the senses

• नियतैः (niyataiḥ) - by the controlled, by the disciplined

• बुद्धिः (buddhiḥ) - intellect, understanding, discernment

• वर्धते (vardhate) - grows, increases, flourishes

• अग्निः (agniḥ) - fire

• इव (iva) - like, as, as if

• इन्धनैः (indhanaiḥ) - by fuels, with fuel

Words meanings and morphology

इन्द्रियाणि (indriyāṇi) - senses, organs of sense

(noun)

Accusative, neuter, plural of indriya

indriya - sense organ, faculty of sense, pertaining to Indra

महत्-प्रेप्सुः (mahat-prepsuḥ) - one who desires great things

(noun)

Nominative, masculine, singular of mahat-prepsu

mahat-prepsu - desirous of great things, aspiring for greatness

Compound type : tatpuruṣa (mahat+prepsu)

• mahat – great, mighty
  adjective
• prepsu – desirous of, seeking
  adjective (masculine)
  Desiderative nominalization
  From īpsu, desiderative of root āp (to obtain), with prefix pra
  Prefix: pra
  Root: āp (class 5)

नियच्छेत् (niyacchet) - one should restrain/control

(verb)

3rd person , singular, active, optative (vidhi-liṅ) of yam

Prefix: ni

Root: yam (class 1)

अर्थ-धर्मयोः (artha-dharmayoḥ) - in matters of wealth and natural law (dharma)

(noun)

Locative, masculine, dual of artha-dharma

artha-dharma - wealth and natural law/duty

Compound type : dvandva (artha+dharma)

• artha – purpose, meaning, wealth, object
  noun (masculine)
• dharma – natural law, duty, righteousness, virtue
  noun (masculine)

इन्द्रियैः (indriyaiḥ) - by the senses

(noun)

Instrumental, neuter, plural of indriya

indriya - sense organ, faculty of sense

नियतैः (niyataiḥ) - by the controlled, by the disciplined

(adjective)

Instrumental, neuter, plural of niyata

niyata - controlled, restrained, disciplined, fixed

Past Passive Participle

From root yam with prefix ni

Prefix: ni

Root: yam (class 1)

बुद्धिः (buddhiḥ) - intellect, understanding, discernment

(noun)

Nominative, feminine, singular of buddhi

buddhi - intellect, understanding, perception, discernment

Root: budh

वर्धते (vardhate) - grows, increases, flourishes

(verb)

3rd person , singular, middle, present (laṭ) of vṛdh

Root: vṛdh (class 1)

अग्निः (agniḥ) - fire

(noun)

Nominative, masculine, singular of agni

agni - fire, sacrificial fire, god of fire

इव (iva) - like, as, as if

(indeclinable)

इन्धनैः (indhanaiḥ) - by fuels, with fuel

(noun)

Instrumental, neuter, plural of indhana

indhana - fuel, kindling wood

Root: indh