योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-124, verse-15

विवेकेनातितीक्ष्णेन बलादय इवायसा ।
मनसैव मनश्छिन्धि सर्वभ्रमस्य शान्तये ॥ १५ ॥

vivekenātitīkṣṇena balādaya ivāyasā ,
manasaiva manaśchindhi sarvabhramasya śāntaye 15

15. vivekena atitīkṣṇena balāt ayaḥ iva ayasā
manasā eva manaḥ chindhi sarvabhramasya śāntaye

15. vivekena atitīkṣṇena balāt ayaḥ iva ayasā
manasā eva manaḥ chindhi sarvabhramasya śāntaye

15. With extremely sharp discrimination (viveka), sever the mind by the mind itself, just as one cuts iron with iron by force, for the complete pacification of all illusion (bhrama).

Words meanings summery:

• विवेकेन (vivekena) - by discrimination, by discernment

• अतितीक्ष्णेन (atitīkṣṇena) - by extremely sharp, by very keen

• बलात् (balāt) - by force, forcibly

• अयः (ayaḥ) - iron

• इव (iva) - like, as, as if

• अयसा (ayasā) - with iron

• मनसा (manasā) - by the mind

• एव (eva) - itself, indeed, only

• मनः (manaḥ) - the mind

• छिन्धि (chindhi) - cut, sever, break

• सर्वभ्रमस्य (sarvabhramasya) - of all illusion, of all error

• शान्तये (śāntaye) - for the pacification, for the cessation

Words meanings and morphology

विवेकेन (vivekena) - by discrimination, by discernment

(noun)

Instrumental, masculine, singular of viveka

viveka - discrimination, discernment, judgment, reason, true knowledge

Root: vic (class 7)

अतितीक्ष्णेन (atitīkṣṇena) - by extremely sharp, by very keen

(adjective)

Instrumental, masculine, singular of atitīkṣṇa

atitīkṣṇa - extremely sharp, very keen, very intense

Compound type : karmadhāraya (ati+tīkṣṇa)

• ati – exceedingly, very, beyond
  indeclinable
• tīkṣṇa – sharp, keen, intense, pungent
  adjective (masculine)

Note: Agrees with 'vivekena'.

बलात् (balāt) - by force, forcibly

(noun)

Ablative, neuter, singular of bala

bala - force, strength, power, army

Note: Ablative case often functions adverbially.

अयः (ayaḥ) - iron

(noun)

Nominative, neuter, singular of ayas

ayas - iron, metal, ore

इव (iva) - like, as, as if

(indeclinable)

अयसा (ayasā) - with iron

(noun)

Instrumental, neuter, singular of ayas

ayas - iron, metal, ore

मनसा (manasā) - by the mind

(noun)

Instrumental, neuter, singular of manas

manas - mind, intellect, heart, consciousness

Root: man (class 4)

एव (eva) - itself, indeed, only

(indeclinable)

मनः (manaḥ) - the mind

(noun)

Accusative, neuter, singular of manas

manas - mind, intellect, heart, consciousness

Root: man (class 4)

छिन्धि (chindhi) - cut, sever, break

(verb)

2nd person , singular, active, imperative (loṭ) of chid

Root: chid (class 7)

सर्वभ्रमस्य (sarvabhramasya) - of all illusion, of all error

(noun)

Genitive, masculine, singular of sarvabhrama

sarvabhrama - all illusion, complete error, total delusion

Compound type : karmadhāraya (sarva+bhrama)

• sarva – all, every, whole
  adjective (masculine)
• bhrama – illusion, error, delusion, wandering
  noun (masculine)
  Root: bhram (class 1)

शान्तये (śāntaye) - for the pacification, for the cessation

(noun)

Dative, feminine, singular of śānti

śānti - peace, tranquility, cessation, pacification, calm

Root: śam (class 4)