योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-123, verse-3

मन्त्रसिद्धैस्तपःसिद्धैस्तन्त्रसिद्धैश्च भूरिशः ।
कृतमाकाशयानादि का तत्र स्यादपूर्वता ॥ ३ ॥

mantrasiddhaistapaḥsiddhaistantrasiddhaiśca bhūriśaḥ ,
kṛtamākāśayānādi kā tatra syādapūrvatā 3

3. mantrasiddhaiḥ tapaḥsiddhaiḥ tantrasiddhaiḥ ca
bhūriśaḥ kṛtam ākāśayānādi kā tatra syāt apūrvatā

3. mantrasiddhaiḥ tapaḥsiddhaiḥ tantrasiddhaiḥ ca
bhūriśaḥ ākāśayānādi kṛtam tatra kā apūrvatā syāt

3. Actions such as flying through the sky have been abundantly performed by those perfected through mantras, those perfected through austerity (tapas), and those perfected through tantras. What unprecedented quality (apūrvatā) could there be in that?

Words meanings summery:

• मन्त्रसिद्धैः (mantrasiddhaiḥ) - by those perfected through mantras

• तपःसिद्धैः (tapaḥsiddhaiḥ) - by those perfected through austerity (tapas)

• तन्त्रसिद्धैः (tantrasiddhaiḥ) - by those perfected through tantras

• च (ca) - and, also

• भूरिशः (bhūriśaḥ) - abundantly, in great number, frequently

• कृतम् (kṛtam) - has been performed (done, performed, made)

• आकाशयानादि (ākāśayānādi) - deeds like flying in the sky (beginning with aerial travel, and so forth, etc.)

• का (kā) - what (feminine), which

• तत्र (tatra) - there, in that case, in that (matter)

• स्यात् (syāt) - may be, would be, should be

• अपूर्वता (apūrvatā) - unprecedentedness, novelty, newness

Words meanings and morphology

मन्त्रसिद्धैः (mantrasiddhaiḥ) - by those perfected through mantras

(noun)

Instrumental, masculine, plural of mantrasiddha

mantrasiddha - one who has achieved perfection or supernatural powers through mantras

Compound type : tatpuruṣa (mantra+siddha)

• mantra – sacred utterance, hymn, prayer, mystical formula
  noun (masculine)
• siddha – accomplished, perfected, achieved; a perfected being
  participle
  Past Passive Participle
  Past passive participle of root 'sidh' (to accomplish, succeed).
  Root: sidh (class 4)

तपःसिद्धैः (tapaḥsiddhaiḥ) - by those perfected through austerity (tapas)

(noun)

Instrumental, masculine, plural of tapaḥsiddha

tapaḥsiddha - one who has achieved perfection or powers through austerity (tapas)

Compound type : tatpuruṣa (tapas+siddha)

• tapas – austerity, penance, spiritual fervor, heat
  noun (neuter)
• siddha – accomplished, perfected, achieved; a perfected being
  participle
  Past Passive Participle
  Past passive participle of root 'sidh' (to accomplish, succeed).
  Root: sidh (class 4)

तन्त्रसिद्धैः (tantrasiddhaiḥ) - by those perfected through tantras

(noun)

Instrumental, masculine, plural of tantrasiddha

tantrasiddha - one who has achieved perfection or powers through tantras

Compound type : tatpuruṣa (tantra+siddha)

• tantra – a system, treatise, school of thought; a tantric text/practice
  noun (neuter)
• siddha – accomplished, perfected, achieved; a perfected being
  participle
  Past Passive Particple
  Past passive participle of root 'sidh' (to accomplish, succeed).
  Root: sidh (class 4)

च (ca) - and, also

(indeclinable)

भूरिशः (bhūriśaḥ) - abundantly, in great number, frequently

(indeclinable)

कृतम् (kṛtam) - has been performed (done, performed, made)

(participle)

Nominative, neuter, singular of kṛta

kṛta - done, made, performed, accomplished

Past Passive Participle

Derived from root 'kṛ' (to do, to make).

Root: kṛ (class 8)

आकाशयानादि (ākāśayānādi) - deeds like flying in the sky (beginning with aerial travel, and so forth, etc.)

(noun)

Nominative, neuter, singular of ākāśayānādi

ākāśayānādi - beginning with aerial travel; aerial travel and so forth

Compound type : tatpuruṣa (ākāśayāna+ādi)

• ākāśayāna – aerial travel, flight, journey through the sky
  noun (neuter)
• ādi – beginning, and so forth, etc.
  noun (neuter)

का (kā) - what (feminine), which

(pronoun)

Nominative, feminine, singular of kim

kim - who, what, which

तत्र (tatra) - there, in that case, in that (matter)

(indeclinable)

स्यात् (syāt) - may be, would be, should be

(verb)

3rd person , singular, active, optative (liṅ) of as

Optative Active

Root 'as' (class 2) in optative mood, 3rd person singular.

Root: as (class 2)

अपूर्वता (apūrvatā) - unprecedentedness, novelty, newness

(noun)

Nominative, feminine, singular of apūrvatā

apūrvatā - unprecedentedness, novelty, strangeness, newness

Derived from 'apūrva' (unprecedented) with the feminine suffix '-tā' for abstract nouns.

Compound type : nañ-tatpuruṣa (a+pūrva+tā)

• a – not, non-
  indeclinable
  Negative prefix
• pūrva – former, prior, previous
  adjective
• tā – suffix for abstract nouns (indicating the state or quality of)
  suffix (feminine)
  Feminine suffix forming abstract nouns from adjectives.