योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-37, verse-55

अब्धिद्यूर्वीनदीशैलशोभाशून्यतरात्मनि ।
जृम्भते द्रष्टृकरणं मृगतृष्णाम्बुवीचिवत् ॥ ५५ ॥

abdhidyūrvīnadīśailaśobhāśūnyatarātmani ,
jṛmbhate draṣṭṛkaraṇaṃ mṛgatṛṣṇāmbuvīcivat 55

55. abdhi-dyūrvī-nadī-śaila-śobhā-śūnyatarātmani
jṛmbhate draṣṭṛkaraṇam mṛgatṛṣṇāmbuvīcivat

55. abdhi-dyūrvī-nadī-śaila-śobhā-śūnyatarātmani
draṣṭṛkaraṇam mṛgatṛṣṇāmbuvīcivat jṛmbhate

55. In the true self (ātman), which is completely devoid of the perceived beauty of oceans, skies, lands, rivers, and mountains, the faculty of perception (draṣṭṛkaraṇa) expands, much like waves of water in a mirage.

Words meanings summery:

• अब्धि-द्यूर्वी-नदी-शैल-शोभा-शून्यतरात्मनि (abdhi-dyūrvī-nadī-śaila-śobhā-śūnyatarātmani) - in the true self (ātman) which is completely devoid of the perceived beauty of oceans, skies, lands, rivers, and mountains (in the self devoid of the splendor of oceans, skies, earths, rivers, mountains)

• जृम्भते (jṛmbhate) - arises, manifests (expands, arises, manifests)

• द्रष्टृकरणम् (draṣṭṛkaraṇam) - the faculty of perception (the faculty of the seer, the act of perceiving)

• मृगतृष्णाम्बुवीचिवत् (mṛgatṛṣṇāmbuvīcivat) - much like waves of water in a mirage (like waves of mirage water)

Words meanings and morphology

अब्धि-द्यूर्वी-नदी-शैल-शोभा-शून्यतरात्मनि (abdhi-dyūrvī-nadī-śaila-śobhā-śūnyatarātmani) - in the true self (ātman) which is completely devoid of the perceived beauty of oceans, skies, lands, rivers, and mountains (in the self devoid of the splendor of oceans, skies, earths, rivers, mountains)

(noun)

Locative, masculine, singular of abdhi-dyūrvī-nadī-śaila-śobhā-śūnyatara-ātman

abdhi-dyūrvī-nadī-śaila-śobhā-śūnyatara-ātman - that self (ātman) which is exceedingly devoid of the splendor of oceans, skies, lands, rivers, mountains

A descriptive compound qualifying ātman as possessing the characteristic of being devoid of the splendor of various natural elements.

Compound type : bahuvrīhi (abdhi+dyu+urvī+nadī+śaila+śobhā+śūnyatara+ātman)

• abdhi – ocean, sea
  noun (masculine)
• dyu – sky, heaven
  noun (feminine)
• urvī – earth, land
  noun (feminine)
• nadī – river
  noun (feminine)
• śaila – mountain, rock
  noun (masculine)
• śobhā – splendor, beauty, luster
  noun (feminine)
• śūnyatara – more empty, exceedingly devoid
  adjective
  comparative degree of śūnya (empty, devoid)
• ātman – self, soul, essence, individual soul, supreme soul
  noun (masculine)

जृम्भते (jṛmbhate) - arises, manifests (expands, arises, manifests)

(verb)

3rd person , singular, middle, present (laṭ) of jṛmbh

root verb

Root: jṛmbh (class 1)

द्रष्टृकरणम् (draṣṭṛkaraṇam) - the faculty of perception (the faculty of the seer, the act of perceiving)

(noun)

Nominative, neuter, singular of draṣṭṛkaraṇa

draṣṭṛkaraṇa - faculty of the seer, instrument of seeing, perception

tatpuruṣa compound of draṣṭṛ (seer) and karaṇa (instrument)

Compound type : ṣaṣṭhī-tatpuruṣa (draṣṭṛ+karaṇa)

• draṣṭṛ – seer, beholder
  noun (masculine)
  agent noun
  derived from root dṛś (to see)
  Root: dṛś (class 1)
• karaṇa – instrument, means, faculty, action
  noun (neuter)
  derived from root kṛ (to do)
  Root: kṛ (class 8)

मृगतृष्णाम्बुवीचिवत् (mṛgatṛṣṇāmbuvīcivat) - much like waves of water in a mirage (like waves of mirage water)

(indeclinable)

compound of mṛgatṛṣṇā (mirage), ambu (water), and vīci (wave)

Compound type : tatpuruṣa (mṛgatṛṣṇā+ambu+vīci)

• mṛgatṛṣṇā – mirage, deer's thirst
  noun (feminine)
• ambu – water
  noun (neuter)
• vīci – wave
  noun (feminine)

Note: -vat is a suffix indicating similarity or likeness.