योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-128, verse-67

तद्वृथा मा कृथाः सर्वं शुद्धेन मनसा मुने ।
देवकार्यं चरामान्यदवतारप्रयोजनम् ॥ ६७ ॥

tadvṛthā mā kṛthāḥ sarvaṃ śuddhena manasā mune ,
devakāryaṃ carāmānyadavatāraprayojanam 67

67. tat vṛthā mā kṛthāḥ sarvam śuddhena manasā mune
devakāryam ca rāma anyat avatāraprayojanam

67. mune tat sarvam śuddhena manasā vṛthā mā kṛthāḥ
ca rāma devakāryam anyat avatāraprayojanam

67. Therefore, O sage (muni), do not make all this effort futile, but rather, with a pure mind, fulfill it. And, O Rama, the divine mission is the very purpose of your incarnation (avatāra).

Words meanings summery:

• तत् (tat) - that, therefore

• वृथा (vṛthā) - in vain, uselessly, fruitlessly

• मा (mā) - do not

• कृथाः (kṛthāḥ) - you should do, you should make

• सर्वम् (sarvam) - all this (effort, purpose mentioned before) (all, whole, everything)

• शुद्धेन (śuddhena) - with pure, with clean

• मनसा (manasā) - by mind, with mind

• मुने (mune) - Addressed to Vishwamitra, or Rama as a great soul. (O sage, O ascetic)

• देवकार्यम् (devakāryam) - divine task, work of the gods

• च (ca) - and, also

• राम (rāma) - O Rama!

• अन्यत् (anyat) - other, different

• अवतारप्रयोजनम् (avatāraprayojanam) - purpose of incarnation

Words meanings and morphology

तत् (tat) - that, therefore

(indeclinable)

Demonstrative pronoun, neuter singular nominative/accusative, or used as an indeclinable 'therefore'.

वृथा (vṛthā) - in vain, uselessly, fruitlessly

(indeclinable)

Adverbial form.

मा (mā) - do not

(indeclinable)

Prohibitive particle used with aorist.

कृथाः (kṛthāḥ) - you should do, you should make

(verb)

2nd person , singular, middle, aorist (luṅ) of kṛ

Aorist injunctive

2nd person singular Aorist (luṅ) middle voice with mā for prohibition.

Root: kṛ (class 8)

Note: Used with mā as a prohibition.

सर्वम् (sarvam) - all this (effort, purpose mentioned before) (all, whole, everything)

(pronoun)

Accusative, neuter, singular of sarva

sarva - all, every, whole, entire

Neuter singular nominative/accusative.

Note: Also can be nominative singular.

शुद्धेन (śuddhena) - with pure, with clean

(adjective)

Instrumental, neuter, singular of śuddha

śuddha - pure, clean, clear, faultless, correct

Past Passive Participle

From root śudh 'to be pure'.

Root: śudh (class 4)

मनसा (manasā) - by mind, with mind

(noun)

Instrumental, neuter, singular of manas

manas - mind, intellect, heart, soul, thought

s-stem noun.

Root: man (class 4)

मुने (mune) - Addressed to Vishwamitra, or Rama as a great soul. (O sage, O ascetic)

(noun)

Vocative, masculine, singular of muni

muni - sage, ascetic, seer, saint

i-stem noun.

Root: man (class 4)

देवकार्यम् (devakāryam) - divine task, work of the gods

(noun)

Nominative, neuter, singular of devakārya

devakārya - work of the gods, divine mission, sacred duty

Compound

Compound type : tatpuruṣa (deva+kārya)

• deva – god, deity, divine
  noun (masculine)
  Root: div (class 4)
• kārya – work, duty, task, what is to be done
  noun (neuter)
  Gerundive
  From root kṛ + ya suffix
  Root: kṛ (class 8)

Note: Also can be accusative singular.

च (ca) - and, also

(indeclinable)

Conjunction.

राम (rāma) - O Rama!

(proper noun)

Vocative, masculine, singular of rāma

rāma - Rama (proper noun, a name of Vishnu's incarnation)

अन्यत् (anyat) - other, different

(pronoun)

Nominative, neuter, singular of anya

anya - other, another, different

Neuter singular nominative/accusative.

Note: Also can be accusative singular.

अवतारप्रयोजनम् (avatāraprayojanam) - purpose of incarnation

(noun)

Nominative, neuter, singular of avatāraprayojana

avatāraprayojana - purpose/reason for an incarnation

Compound

Compound type : tatpuruṣa (avatāra+prayojana)

• avatāra – descent, incarnation (avatāra), manifested form
  noun (masculine)
  From ava-tṛ 'to descend'
  Prefix: ava
  Root: tṛ (class 1)
• prayojana – purpose, object, motive, utility, advantage
  noun (neuter)
  From pra-yuj
  Prefix: pra
  Root: yuj (class 7)

Note: Also can be accusative singular.