योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-192, verse-13

मृगतृष्णाम्बुगन्धर्वनगरद्वीन्दुविभ्रमः ।
तथाऽविद्याभ्रमश्चायं विचारान्नोपलभ्यते ॥ १३ ॥

mṛgatṛṣṇāmbugandharvanagaradvīnduvibhramaḥ ,
tathā'vidyābhramaścāyaṃ vicārānnopalabhyate 13

13. mṛgatṛṣṇāmbugandharvanagaradvīnduvibhramaḥ tathā
avidyābhramaḥ ca ayam vicārāt na upalabhyate

13. ayam avidyābhramaḥ ca mṛgatṛṣṇāmbugandharvanagaradvīnduvibhramaḥ
tathā vicārāt na upalabhyate

13. Like the illusion of mirage water, a phantom city, or a double moon, this illusion of ignorance (avidyā) is not found when investigated.

Words meanings summery:

• मृगतृष्णाम्बुगन्धर्वनगरद्वीन्दुविभ्रमः (mṛgatṛṣṇāmbugandharvanagaradvīnduvibhramaḥ) - illusion of mirage water, a phantom city, and a double moon

• तथा (tathā) - similarly (thus, so, similarly)

• अविद्याभ्रमः (avidyābhramaḥ) - illusion caused by spiritual ignorance (avidyā) (illusion of ignorance)

• च (ca) - and (and, also)

• अयम् (ayam) - this (this, this one)

• विचारात् (vicārāt) - through investigation (from investigation, by discrimination, by deliberation)

• न (na) - not (not, no)

• उपलभ्यते (upalabhyate) - is found (is perceived, is found, is obtained)

Words meanings and morphology

मृगतृष्णाम्बुगन्धर्वनगरद्वीन्दुविभ्रमः (mṛgatṛṣṇāmbugandharvanagaradvīnduvibhramaḥ) - illusion of mirage water, a phantom city, and a double moon

(noun)

Nominative, masculine, singular of mṛgatṛṣṇāmbugandharvanagaradvīnduvibhrama

mṛgatṛṣṇāmbugandharvanagaradvīnduvibhrama - illusion of mirage water, a phantom city, and a double moon

Compound type : descriptive compound of illusions ending with vibhrama (mṛgatṛṣṇā+ambu+gandharvanagara+dvīndu+vibhrama)

• mṛgatṛṣṇā – mirage; thirst of a deer
  noun (feminine)
• ambu – water
  noun (neuter)
• gandharvanagara – city of Gandharvas; phantom city; mirage city
  noun (neuter)
• dvīndu – double moon; illusion of two moons
  noun (masculine)
• vibhrama – illusion, error, confusion, mistake
  noun (masculine)
  Derived from root BHRAM with prefix VI-
  Prefix: vi
  Root: bhram (class 1)

Note: This entire compound functions as the subject in the nominative singular, masculine gender.

तथा (tathā) - similarly (thus, so, similarly)

(indeclinable)

अविद्याभ्रमः (avidyābhramaḥ) - illusion caused by spiritual ignorance (avidyā) (illusion of ignorance)

(noun)

Nominative, masculine, singular of avidyābhrama

avidyābhrama - illusion of ignorance

Compound type : tatpuruṣa (avidyā+bhrama)

• avidyā – ignorance, spiritual ignorance
  noun (feminine)
  Formed with 'a' (negation) + vidyā (knowledge)
• bhrama – illusion, error, wandering, confusion
  noun (masculine)
  Derived from root BHRAM
  Root: bhram (class 1)

च (ca) - and (and, also)

(indeclinable)

अयम् (ayam) - this (this, this one)

(pronoun)

Nominative, masculine, singular of idam

idam - this, this one

Demonstrative pronoun.

विचारात् (vicārāt) - through investigation (from investigation, by discrimination, by deliberation)

(noun)

Ablative, masculine, singular of vicāra

vicāra - investigation, discrimination, deliberation, inquiry

Derived from root CAR with prefix VI-.

Prefix: vi

Root: car (class 1)

Note: The ablative case here denotes the means or cause.

न (na) - not (not, no)

(indeclinable)

Particle of negation.

उपलभ्यते (upalabhyate) - is found (is perceived, is found, is obtained)

(verb)

3rd person , singular, passive, present (laṭ) of upalabh

Present tense, passive voice, 3rd person singular.

Derived from root LABH with prefix UPA-. The 'ya' is an infix for passive voice.

Prefix: upa

Root: labh (class 1)

Note: The subject 'avidyābhramaḥ' is masculine singular, so the verb agrees.