महाभारतः mahābhārataḥ - book-13, chapter-67, verse-20

एतत्सुदुर्लभतरमिह लोके द्विजोत्तम ।
आपो नित्यं प्रदेयास्ते पुण्यं ह्येतदनुत्तमम् ॥२०॥

20. etatsudurlabhataramiha loke dvijottama ,
āpo nityaṁ pradeyāste puṇyaṁ hyetadanuttamam.

20. etat sudurlabhataram iha loke dvijottama āpaḥ
nityam pradeyāḥ te puṇyam hi etat anuttamam

20. dvijottama iha loke etat sudurlabhataram āpaḥ
nityam te pradeyāḥ hi etat puṇyam anuttamam

20. O best of the twice-born (dvijottama), this (act of giving water) is exceedingly rare in this world. Water should always be given by you; for indeed, this merit (puṇya) is unsurpassed.

Words meanings summery:

• एतत् (etat) - this (act of giving water) (this, this one)

• सुदुर्लभतरम् (sudurlabhataram) - exceedingly rare (exceedingly difficult to obtain, very rare)

• इह (iha) - in this world (here, in this world)

• लोके (loke) - in this world (in the world, in the realm)

• द्विजोत्तम (dvijottama) - O best of the twice-born (dvijottama) (O best of the twice-born)

• आपः (āpaḥ) - water (waters, water)

• नित्यम् (nityam) - always (always, constantly)

• प्रदेयाः (pradeyāḥ) - should be given (to be given, should be given)

• ते (te) - by you (O best of twice-born) (by you (singular), to you (singular))

• पुण्यम् (puṇyam) - merit (puṇya) (merit, virtue, good deed)

• हि (hi) - for indeed (indeed, for, surely)

• एतत् (etat) - this (merit) (this, this one)

• अनुत्तमम् (anuttamam) - unsurpassed (unsurpassed, excellent, supreme)

Words meanings and morphology

एतत् (etat) - this (act of giving water) (this, this one)

(pronoun)

Nominative, neuter, singular of etad

etad - this, this one

सुदुर्लभतरम् (sudurlabhataram) - exceedingly rare (exceedingly difficult to obtain, very rare)

(adjective)

Nominative, neuter, singular of sudurlabhatara

sudurlabhatara - more difficult to obtain, very rare

compound of su (very) + durlabha (difficult to obtain) + tara (comparative suffix, here used for intensity)

Compound type : bahuvrīhi (su+durlabha+tara)

• su – good, well, very, easily
  indeclinable
  prefix for intensification or goodness
• durlabha – difficult to obtain, rare
  adjective (neuter)
  compound of dur (difficult) + labha (obtainable)
  Prefix: dur
  Root: labh (class 1)
• tara – more, exceedingly (comparative suffix)
  indeclinable
  suffix added to adjectives to form comparative degree, or to intensify meaning

इह (iha) - in this world (here, in this world)

(indeclinable)

लोके (loke) - in this world (in the world, in the realm)

(noun)

Locative, masculine, singular of loka

loka - world, realm, people, common practice

Root: lok (class 1)

द्विजोत्तम (dvijottama) - O best of the twice-born (dvijottama) (O best of the twice-born)

(noun)

Vocative, masculine, singular of dvijottama

dvijottama - best of the twice-born (i.e., Brahmins)

compound of dvija (twice-born) and uttama (best)

Compound type : tatpuruṣa (dvija+uttama)

• dvija – twice-born (a Brahmin, a bird, a tooth)
  noun (masculine)
  compound dvi (twice) + ja (born)
  Root: jan (class 4)
• uttama – best, highest, supreme
  adjective (masculine)
  superlative of ud-tama
  Prefix: ud

आपः (āpaḥ) - water (waters, water)

(noun)

Nominative, feminine, plural of ap

ap - water, waters

नित्यम् (nityam) - always (always, constantly)

(indeclinable)

प्रदेयाः (pradeyāḥ) - should be given (to be given, should be given)

(adjective)

Nominative, feminine, plural of pradeya

pradeya - to be given, fit to be given, due, to be offered

Gerundive (kṛtya)

derived from root dā with prefix pra

Prefix: pra

Root: dā (class 3)

ते (te) - by you (O best of twice-born) (by you (singular), to you (singular))

(pronoun)

Instrumental, singular of yūṣmad

yūṣmad - you

Note: could also be dative singular

पुण्यम् (puṇyam) - merit (puṇya) (merit, virtue, good deed)

(noun)

Nominative, neuter, singular of puṇya

puṇya - virtuous, pure, good, auspicious; merit, virtue, good deed

Note: can also be accusative

हि (hi) - for indeed (indeed, for, surely)

(indeclinable)

एतत् (etat) - this (merit) (this, this one)

(pronoun)

Nominative, neuter, singular of etad

etad - this, this one

अनुत्तमम् (anuttamam) - unsurpassed (unsurpassed, excellent, supreme)

(adjective)

Nominative, neuter, singular of anuttama

anuttama - having nothing superior, unsurpassed, best, excellent

negative prefix an + uttama (best)

Compound type : nañ-tatpuruṣa (an+uttama)

• an – not, un-
  indeclinable
  negative prefix
• uttama – best, highest, supreme
  adjective (neuter)
  superlative of ud-tama
  Prefix: ud

Note: can also be accusative