योगवासिष्ठः yogavāsiṣṭhaḥ - book-1, chapter-26, verse-31

अश्राव्यावाच्यदुर्दर्शतत्त्वेनाज्ञातमूर्तिना ।
भुवनानि विडम्ब्यन्ते केनचिद्भ्रमदायिना ॥ ३१ ॥

aśrāvyāvācyadurdarśatattvenājñātamūrtinā ,
bhuvanāni viḍambyante kenacidbhramadāyinā 31

31. aśrāvyāvācyadurdarśatattvena ajñātamūrtinā
bhuvanāni viḍambyante kenacit bhramadāyinā

31. aśrāvyāvācyadurdarśatattvena ajñātamūrtinā
bhramadāyinā kenacit bhuvanāni viḍambyante

31. By some unknown entity (kenacit), whose essential nature (tattva) is unhearable, unspeakable, and undiscernible, whose form (mūrti) is unknown, and who causes delusion (bhramadāyin)—the worlds (bhuvana) are deceived.

Words meanings summery:

• अश्राव्यावाच्यदुर्दर्शतत्त्वेन (aśrāvyāvācyadurdarśatattvena) - by an essential nature that is unhearable, unspeakable, and undiscernible (by an essence/reality that is unhearable, unspeakable, and undiscernible)

• अज्ञातमूर्तिना (ajñātamūrtinā) - by one whose form (mūrti) is unknown (by one whose form is unknown)

• भुवनानि (bhuvanāni) - the worlds (bhuvana) (worlds, beings, places)

• विडम्ब्यन्ते (viḍambyante) - are deceived (are deceived, are deluded, are mocked, are imitated)

• केनचित् (kenacit) - by some (unknown) entity (by some, by a certain one, by someone)

• भ्रमदायिना (bhramadāyinā) - by one who causes delusion (by one causing delusion, by one creating confusion)

Words meanings and morphology

अश्राव्यावाच्यदुर्दर्शतत्त्वेन (aśrāvyāvācyadurdarśatattvena) - by an essential nature that is unhearable, unspeakable, and undiscernible (by an essence/reality that is unhearable, unspeakable, and undiscernible)

(noun)

Instrumental, neuter, singular of aśrāvyāvācyadurdarśatattva

aśrāvyāvācyadurdarśatattva - essence that is unhearable, unspeakable, undiscernible

Compound type : tatpuruṣa (aśrāvya+avācya+durdarśa+tattva)

• aśrāvya – unhearable, not to be heard
  adjective (neuter)
  Gerundive/NVP
  From 'a-' (negation) and √śru (to hear) + gerundive suffix -ya
  Prefix: a
  Root: śru (class 5)
• avācya – unspeakable, not to be spoken
  adjective (neuter)
  Gerundive/NVP
  From 'a-' (negation) and √vac (to speak) + gerundive suffix -ya
  Prefix: a
  Root: vac (class 2)
• durdarśa – difficult to see, undiscernible, invisible
  adjective (neuter)
  Gerundive/NVP
  From 'dur-' (badly, difficult) and √dṛś (to see) + gerundive suffix -a
  Prefix: dur
  Root: dṛś (class 1)
• tattva – reality, truth, essence, principle
  noun (neuter)

Note: Acts as an instrumental modifier for the implied agent.

अज्ञातमूर्तिना (ajñātamūrtinā) - by one whose form (mūrti) is unknown (by one whose form is unknown)

(adjective)

Instrumental, masculine, singular of ajñātamūrti

ajñātamūrti - whose form is unknown

Compound type : bahuvrīhi (ajñāta+mūrti)

• ajñāta – unknown, not known
  adjective
  Past Passive Participle
  From 'a-' (negation) and Past Passive Participle of √jñā (to know)
  Prefix: a
  Root: jñā (class 9)
• mūrti – form, body, figure, embodiment
  noun (feminine)

Note: Qualifies kenacit.

भुवनानि (bhuvanāni) - the worlds (bhuvana) (worlds, beings, places)

(noun)

Nominative, neuter, plural of bhuvana

bhuvana - world, earth, being, creature, dwelling

From root √bhū (to be)

Root: bhū (class 1)

Note: Subject of viḍambyante.

विडम्ब्यन्ते (viḍambyante) - are deceived (are deceived, are deluded, are mocked, are imitated)

(verb)

3rd person , plural, passive, present (laṭ) of viḍamb

Present Passive

Root √viḍamb (10th class) in passive voice, present tense, 3rd person plural

Root: viḍamb (class 10)

केनचित् (kenacit) - by some (unknown) entity (by some, by a certain one, by someone)

(pronoun)

Instrumental, masculine, singular of kimcid

kimcid - something, someone, a certain (indefinite pronoun)

Derived from 'kim' (what) and 'cid' (a particle forming indefinite pronouns)

Compound type : tatpuruṣa (kim+cid)

• kim – who, what, which
  pronoun (masculine)
• cid – a particle expressing indefiniteness
  indeclinable

Note: Acts as the agent in the passive construction.

भ्रमदायिना (bhramadāyinā) - by one who causes delusion (by one causing delusion, by one creating confusion)

(adjective)

Instrumental, masculine, singular of bhramadāyin

bhramadāyin - causing delusion, creating confusion, deluding

Compound of 'bhrama' (delusion) and 'dāyin' (giving, causing)

Compound type : tatpuruṣa (bhrama+dāyin)

• bhrama – delusion, error, wandering, mistake
  noun (masculine)
  Root: bhram (class 1)
• dāyin – giving, granting, causing, bestowing
  adjective (masculine)
  Agent Noun/Suffix
  From root √dā (to give) with suffix -in
  Root: dā (class 3)

Note: Qualifies kenacit.