महाभारतः mahābhārataḥ - book-13, chapter-130, verse-15

अष्टमीयज्ञपरता चातुर्मास्यनिषेवणम् ।
पौर्णमास्यां तु यो यज्ञो नित्ययज्ञस्तथैव च ॥१५॥

15. aṣṭamīyajñaparatā cāturmāsyaniṣevaṇam ,
paurṇamāsyāṁ tu yo yajño nityayajñastathaiva ca.

15. aṣṭamīyajñaparatā cāturmāsyaniṣevaṇam paurṇamāsyām
tu yaḥ yajñaḥ nityayajñaḥ tathaiva ca

15. aṣṭamīyajñaparatā cāturmāsyaniṣevaṇam paurṇamāsyām
tu yaḥ yajñaḥ nityayajñaḥ tathaiva ca

15. Also (among their duties are) devotion to the (Vedic ritual) (yajña) performed on the eighth lunar day and the observance of the Cāturmāsya vows. Moreover, the (Vedic ritual) (yajña) on the full moon day (paurṇamāsī) and the regular daily (yajña) are likewise (to be observed).

Words meanings summery:

• अष्टमीयज्ञपरता (aṣṭamīyajñaparatā) - devotion to the specific (yajña) performed on the eighth lunar day (devotion to the (Vedic ritual) (yajña) on the eighth day)

• चातुर्मास्यनिषेवणम् (cāturmāsyaniṣevaṇam) - the observance of the Cāturmāsya vows and rituals (the observance of the four-month period (Cāturmāsya))

• पौर्णमास्याम् (paurṇamāsyām) - specifically on the full moon day (for rituals) (on the full moon day)

• तु (tu) - introducing an additional point or emphasis (but, indeed, yet, however)

• यः (yaḥ) - referring to the specific (yajña) mentioned (who, which)

• यज्ञः (yajñaḥ) - a specific Vedic ritual (yajña) ((Vedic ritual), sacrifice, worship)

• नित्ययज्ञः (nityayajñaḥ) - the regular, mandatory daily (Vedic ritual) (the daily (Vedic ritual), constant (Vedic ritual))

• तथैव (tathaiva) - indicating that it is also a duty, similar to the preceding ones (and likewise, even so, in the same way)

• च (ca) - connects the various duties in the list (and, also, moreover)

Words meanings and morphology

अष्टमीयज्ञपरता (aṣṭamīyajñaparatā) - devotion to the specific (yajña) performed on the eighth lunar day (devotion to the (Vedic ritual) (yajña) on the eighth day)

(noun)

Nominative, feminine, singular of aṣṭamīyajñaparatā

aṣṭamīyajñaparatā - devotion to the (Vedic ritual) of the eighth lunar day

Compound: aṣṭamī (eighth lunar day) + yajña (Vedic ritual) + paratā (devotion, supreme state).

Compound type : Tatpuruṣa (aṣṭamī+yajña+paratā)

• aṣṭamī – the eighth day of a lunar fortnight
  noun (feminine)
  From aṣṭan (eight) + suffix -amī.
• yajña – (Vedic ritual), sacrifice, devotion, worship
  noun (masculine)
  From root √yaj (to worship, sacrifice)
  Root: √yaj (class 1)
• paratā – devotion, attachment, highest state, supremacy
  noun (feminine)
  Abstract noun from para (supreme, devoted to)

Note: Another duty.

चातुर्मास्यनिषेवणम् (cāturmāsyaniṣevaṇam) - the observance of the Cāturmāsya vows and rituals (the observance of the four-month period (Cāturmāsya))

(noun)

Nominative, neuter, singular of cāturmāsyaniṣevaṇa

cāturmāsyaniṣevaṇa - observance of the four-month (vow/period)

Compound: cāturmāsya (relating to four months) + niṣevaṇa (observance).

Compound type : Tatpuruṣa (cāturmāsya+niṣevaṇa)

• cāturmāsya – relating to four months, the four-month period (of vows)
  noun/adjective (neuter)
  From caturmāsa (four months) + suffix -ya.
• niṣevaṇa – service, practice, observance, performance
  noun (neuter)
  Verbal noun
  From √sev (to serve, practice) with prefix ni- and suffix -ana
  Prefix: ni
  Root: √sev (class 1)

Note: Another duty.

पौर्णमास्याम् (paurṇamāsyām) - specifically on the full moon day (for rituals) (on the full moon day)

(noun)

Locative, feminine, singular of paurṇamāsī

paurṇamāsī - the day of the full moon, full moon festival

From pūrṇamāsa (full moon month) + suffix -ī.

Note: Specifies the time of a (yajña).

तु (tu) - introducing an additional point or emphasis (but, indeed, yet, however)

(indeclinable)

Particle.

यः (yaḥ) - referring to the specific (yajña) mentioned (who, which)

(pronoun)

Nominative, masculine, singular of yad

yad - which, what (relative pronoun)

Relative pronoun.

Note: Refers to yajñaḥ.

यज्ञः (yajñaḥ) - a specific Vedic ritual (yajña) ((Vedic ritual), sacrifice, worship)

(noun)

Nominative, masculine, singular of yajña

yajña - (Vedic ritual), sacrifice, devotion, worship

From root √yaj (to worship, sacrifice).

Root: √yaj (class 1)

Note: Subject of the clause.

नित्ययज्ञः (nityayajñaḥ) - the regular, mandatory daily (Vedic ritual) (the daily (Vedic ritual), constant (Vedic ritual))

(noun)

Nominative, masculine, singular of nityayajña

nityayajña - constant (Vedic ritual), daily (Vedic ritual), obligatory (Vedic ritual)

Compound: nitya (constant, daily) + yajña (Vedic ritual).

Compound type : Tatpuruṣa (nitya+yajña)

• nitya – constant, eternal, daily, obligatory
  adjective (masculine/neuter/feminine)
• yajña – (Vedic ritual), sacrifice, devotion, worship
  noun (masculine)
  From root √yaj (to worship, sacrifice)
  Root: √yaj (class 1)

Note: Another duty.

तथैव (tathaiva) - indicating that it is also a duty, similar to the preceding ones (and likewise, even so, in the same way)

(indeclinable)

Compound of tathā (thus, so) + eva (only, indeed).

Compound type : Avyayībhāva (tathā+eva)

• tathā – thus, so, in that manner
  indeclinable
• eva – only, just, indeed, certainly
  indeclinable

च (ca) - connects the various duties in the list (and, also, moreover)

(indeclinable)

Conjunction.

Note: Placed after the word it connects.