योगवासिष्ठः yogavāsiṣṭhaḥ - book-1, chapter-30, verse-4

विकल्पेभ्यो लुठन्त्येताश्चान्तःकरणवृत्तयः ।
श्वभ्रेभ्य इव सारङ्गास्तुच्छालम्बविडम्बिताः ॥ ४ ॥

vikalpebhyo luṭhantyetāścāntaḥkaraṇavṛttayaḥ ,
śvabhrebhya iva sāraṅgāstucchālambaviḍambitāḥ 4

4. vikalpebhyas luṭhanti etāḥ ca antaḥkaraṇavṛttayaḥ
śvabhrebhyas iva sāreṅgāḥ tucchālambaviḍambitāḥ

4. ca etāḥ antaḥkaraṇavṛttayaḥ vikalpebhyas luṭhanti,
tucchālambaviḍambitāḥ sāreṅgāḥ śvabhrebhyas iva (luṭhanti)

4. And these modifications of the inner organ (antaḥkaraṇa) tumble about due to false notions, just like deer from chasms, having been deceived by relying on trivial support.

Words meanings summery:

• विकल्पेभ्यस् (vikalpebhyas) - from doubts, from alternatives, from false notions

• लुठन्ति (luṭhanti) - they roll, tumble, fall

• एताः (etāḥ) - these

• च (ca) - and

• अन्तःकरणवृत्तयः (antaḥkaraṇavṛttayaḥ) - activities/modifications of the inner organ

• श्वभ्रेभ्यस् (śvabhrebhyas) - from pits, from chasms

• इव (iva) - like, as, as if

• सारेङ्गाः (sāreṅgāḥ) - deer

• तुच्छालम्बविडम्बिताः (tucchālambaviḍambitāḥ) - deluded/deceived by trifling support

Words meanings and morphology

विकल्पेभ्यस् (vikalpebhyas) - from doubts, from alternatives, from false notions

(noun)

Ablative, masculine, plural of vikalpa

vikalpa - doubt, uncertainty, alternative, option, false notion, mental construct

From root kḷp with prefix vi-

Prefix: vi

Root: kḷp (class 1)

लुठन्ति (luṭhanti) - they roll, tumble, fall

(verb)

3rd person , plural, active, present (laṭ) of luṭh

Root: luṭh (class 1)

एताः (etāḥ) - these

(pronoun)

Nominative, feminine, plural of etas

etas - this, these

Demonstrative pronoun

Note: Refers to 'antaḥkaraṇavṛttayaḥ'.

च (ca) - and

(indeclinable)

Conjunction

अन्तःकरणवृत्तयः (antaḥkaraṇavṛttayaḥ) - activities/modifications of the inner organ

(noun)

Nominative, feminine, plural of antaḥkaraṇavṛtti

antaḥkaraṇavṛtti - modification of the inner organ; activities of the mind

Compound type : Tatpuruṣa (antaḥkaraṇa+vṛtti)

• antaḥkaraṇa – inner organ, mind, intellect
  noun (neuter)
  From root kṛ with prefix antar-
  Prefix: antar
  Root: kṛ (class 8)
• vṛtti – modification, activity, function, state
  noun (feminine)
  From root vṛt
  Root: vṛt (class 1)

Note: Subject of the sentence.

श्वभ्रेभ्यस् (śvabhrebhyas) - from pits, from chasms

(noun)

Ablative, masculine, plural of śvabhra

śvabhra - pit, chasm, abyss, hole

Note: Part of simile.

इव (iva) - like, as, as if

(indeclinable)

Particle of comparison

सारेङ्गाः (sāreṅgāḥ) - deer

(noun)

Nominative, masculine, plural of sāraṅga

sāraṅga - deer, cuckoo, elephant, bee, cloud, etc. (often means spotted or variegated)

Note: Part of simile.

तुच्छालम्बविडम्बिताः (tucchālambaviḍambitāḥ) - deluded/deceived by trifling support

(adjective)

Nominative, masculine, plural of tucchālambaviḍambita

tucchālambaviḍambita - deluded by trifling support; mocked by empty reliance

Compound type : Tatpuruṣa (tuccha+ālamba+viḍambita)

• tuccha – empty, trifling, insignificant, worthless
  adjective (masculine)
• ālamba – support, reliance, basis, object
  noun (masculine)
  From root lamb with prefix ā-
  Prefix: ā
  Root: lamb (class 1)
• viḍambita – deluded, deceived, mocked, disappointed
  adjective (masculine)
  Past Passive Participle
  From root viḍamb
  Root: viḍamb (class 10)

Note: Qualifies 'sāraṅgāḥ'.