योगवासिष्ठः yogavāsiṣṭhaḥ - book-4, chapter-54, verse-16

संकल्पो येन हन्तव्यस्तेन भावविपर्ययात् ।
अप्यर्धेन निमेषेण लीलयैव निहन्यते ॥ १६ ॥

saṃkalpo yena hantavyastena bhāvaviparyayāt ,
apyardhena nimeṣeṇa līlayaiva nihanyate 16

16. saṃkalpaḥ yena hantavyaḥ tena bhāva-viparyayāt
api ardhena nimeṣeṇa līlayā eva nihanyate

16. yena saṃkalpaḥ hantavyaḥ,
tena bhāva-viparyayāt api ardhena nimeṣeṇa līlayā eva nihanyate

16. The resolve (saṃkalpa) that is to be overcome by someone is indeed vanquished by them effortlessly, within half a moment, merely through a reversal of mental constructs (bhāva-viparyaya).

Words meanings summery:

• संकल्पः (saṁkalpaḥ) - resolve, intention, mental construct (saṃkalpa)

• येन (yena) - by whom (referring to the person who desires to overcome saṃkalpa) (by whom, by which)

• हन्तव्यः (hantavyaḥ) - to be overcome (to be killed, to be destroyed, to be overcome)

• तेन (tena) - by him, by that (person)

• भाव-विपर्ययात् (bhāva-viparyayāt) - merely through a reversal of mental constructs (bhāva-viparyaya) (from the reversal/opposite of mental constructs)

• अपि (api) - even (even, also)

• अर्धेन (ardhena) - in half (by half)

• निमेषेण (nimeṣeṇa) - within a moment/wink of an eye (by a wink, by a moment)

• लीलया (līlayā) - effortlessly (playfully, easily, effortlessly)

• एव (eva) - indeed, just, only

• निहन्यते (nihanyate) - is vanquished (is killed, is destroyed, is vanquished)

Words meanings and morphology

संकल्पः (saṁkalpaḥ) - resolve, intention, mental construct (saṃkalpa)

(noun)

Nominative, masculine, singular of saṃkalpa

saṁkalpa - resolve, intention, mental construct (saṃkalpa)

From sam-kḷp

Prefix: sam

Root: kḷp (class 1)

Note: The subject of the implied passive action "is to be killed" and "is destroyed".

येन (yena) - by whom (referring to the person who desires to overcome saṃkalpa) (by whom, by which)

(pronoun)

Instrumental, masculine, singular of yad

yad - who, which, what

Note: Agent of hantavyaḥ.

हन्तव्यः (hantavyaḥ) - to be overcome (to be killed, to be destroyed, to be overcome)

(adjective)

Nominative, masculine, singular of hantavya

hantavya - to be killed, to be destroyed, to be overcome

Gerundive (kṛtya)

From √han + -tavya

Root: han (class 2)

Note: Agrees with saṃkalpaḥ.

तेन (tena) - by him, by that (person)

(pronoun)

Instrumental, masculine, singular of tad

tad - that, this

Correlative pronoun to yena.

Note: Agent of nihanyate.

भाव-विपर्ययात् (bhāva-viparyayāt) - merely through a reversal of mental constructs (bhāva-viparyaya) (from the reversal/opposite of mental constructs)

(noun)

Ablative, masculine, singular of bhāva-viparyaya

bhāva-viparyaya - reversal/opposite of mental constructs/state

Compound type : tatpurusha (bhāva+viparyaya)

• bhāva – mental construct, state of being, ideation, feeling
  noun (masculine)
  From root √bhū
  Root: bhū (class 1)
• viparyaya – reversal, inversion, opposite, change
  noun (masculine)
  From vi-pari-i
  Prefixes: vi+pari
  Root: i (class 2)

Note: Denotes the cause or means.

अपि (api) - even (even, also)

(indeclinable)

अर्धेन (ardhena) - in half (by half)

(adjective)

Instrumental, neuter, singular of ardha

ardha - half, part

Note: Used adverbially to denote time.

निमेषेण (nimeṣeṇa) - within a moment/wink of an eye (by a wink, by a moment)

(noun)

Instrumental, masculine, singular of nimeṣa

nimeṣa - wink, twinkle of an eye, a moment

From ni-miṣ

Prefix: ni

Root: miṣ (class 1)

लीलया (līlayā) - effortlessly (playfully, easily, effortlessly)

(noun)

Instrumental, feminine, singular of līlā

līlā - play, sport, ease, grace

एव (eva) - indeed, just, only

(indeclinable)

निहन्यते (nihanyate) - is vanquished (is killed, is destroyed, is vanquished)

(verb)

3rd person , singular, passive, present indicative (laṭ) of nihan

Passive voice formation.

Prefix: ni

Root: han (class 2)

Note: Agrees with saṃkalpaḥ.