महाभारतः mahābhārataḥ - book-1, chapter-54, verse-13

पाद्यमाचमनीयं च अर्घ्यं गां च विधानतः ।
पितामहाय कृष्णाय तदर्हाय न्यवेदयत् ॥१३॥

13. pādyamācamanīyaṁ ca arghyaṁ gāṁ ca vidhānataḥ ,
pitāmahāya kṛṣṇāya tadarhāya nyavedayat.

13. pādyam ācamanīyam ca arghyam gām ca vidhānataḥ
pitāmahāya kṛṣṇāya tad-arhāya nyavedayat

13. He respectfully presented water for the feet, water for sipping, a special offering (arghya), and a cow, all according to the proper rites, to his grandfather Krishna (Vyasa), who was indeed deserving of such honor.

Words meanings summery:

• पाद्यम् (pādyam) - the offering of water for washing feet (water for washing feet)

• आचमनीयम् (ācamanīyam) - the offering of water for ritual sipping (water for sipping (ritual purification))

• च (ca) - and (and, also)

• अर्घ्यम् (arghyam) - a special respectful offering (respectful offering (water, rice, flowers etc.))

• गाम् (gām) - a cow (as an offering) (cow)

• च (ca) - and (and, also)

• विधानतः (vidhānataḥ) - according to ritual procedure (according to rule, properly, methodically)

• पितामहाय (pitāmahāya) - to his (Janamejaya's) grandfather (Vyasa) (to the grandfather)

• कृष्णाय (kṛṣṇāya) - to Krishna Dvaipayana Vyasa (to Krishna (Vyasa))

• तद्-अर्हाय (tad-arhāya) - to him who was worthy of such offerings (to him who is worthy of that, to the deserving one)

• न्यवेदयत् (nyavedayat) - Janamejaya offered (these items) (he offered, he presented, he announced)

Words meanings and morphology

पाद्यम् (pādyam) - the offering of water for washing feet (water for washing feet)

(noun)

Accusative, neuter, singular of pādya

pādya - water for the feet; fit for the feet

Derived from pāda (foot)

आचमनीयम् (ācamanīyam) - the offering of water for ritual sipping (water for sipping (ritual purification))

(noun)

Accusative, neuter, singular of ācamanīya

ācamanīya - water for rinsing the mouth (sipping)

gerundive

Derived from root cam with prefix ā

Prefix: ā

Root: cam (class 1)

च (ca) - and (and, also)

(indeclinable)

अर्घ्यम् (arghyam) - a special respectful offering (respectful offering (water, rice, flowers etc.))

(noun)

Accusative, neuter, singular of arghya

arghya - worthy of respect, venerable; respectful offering

Derived from argha (value, reverence)

गाम् (gām) - a cow (as an offering) (cow)

(noun)

Accusative, feminine, singular of go

go - cow, ox, cattle; earth, ray of light

च (ca) - and (and, also)

(indeclinable)

विधानतः (vidhānataḥ) - according to ritual procedure (according to rule, properly, methodically)

(indeclinable)

Derived from vidhāna with suffix -tas

Note: Adverbial usage.

पितामहाय (pitāmahāya) - to his (Janamejaya's) grandfather (Vyasa) (to the grandfather)

(noun)

Dative, masculine, singular of pitāmaha

pitāmaha - paternal grandfather; creator Brahma

Note: Vyasa was Janamejaya's great-grandfather (Parikshit was his grandfather, Arjuna was great-grandfather), but 'pitāmaha' can also refer to a venerable elder or ancestor.

कृष्णाय (kṛṣṇāya) - to Krishna Dvaipayana Vyasa (to Krishna (Vyasa))

(noun)

Dative, masculine, singular of kṛṣṇa

kṛṣṇa - Krishna (proper name of Vyasa, whose full name is Krishna Dvaipayana Vyasa); dark, black

Note: Refers to Vyasa.

तद्-अर्हाय (tad-arhāya) - to him who was worthy of such offerings (to him who is worthy of that, to the deserving one)

(adjective)

Dative, masculine, singular of tad-arha

tad-arha - worthy of that, deserving of it

Compound type : bahuvrīhi (tad+arha)

• tad – that, it
  pronoun (neuter)
• arha – deserving, worthy, fit
  adjective (masculine)
  Derived from root arh (to deserve)
  Root: arh (class 1)

Note: Modifies Vyasa.

न्यवेदयत् (nyavedayat) - Janamejaya offered (these items) (he offered, he presented, he announced)

(verb)

3rd person , singular, active, past imperfect (laṅ) of vid

causative

Imperfect tense, from causative stem of root vid, with prefix ni

Prefix: ni

Root: vid (class 4)