योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-41, verse-6

अविद्यां श्रेष्ठया श्रेष्ठां क्षालयन्निह तिष्ठति ।
मलं मलेनापहरन्युक्तिज्ञो रजको यथा ॥ ६ ॥

avidyāṃ śreṣṭhayā śreṣṭhāṃ kṣālayanniha tiṣṭhati ,
malaṃ malenāpaharanyuktijño rajako yathā 6

6. avidyām śreṣṭhayā śreṣṭhām kṣālayat iha tiṣṭhati
malam malena apaharan yuktijñaḥ rajakaḥ yathā

6. iha śreṣṭhayā śreṣṭhām avidyām kṣālayat malena
malam apaharan yuktijñaḥ rajakaḥ yathā tiṣṭhati

6. …he remains here, washing away the supreme (actual) nescience (avidyā) by means of a superior (sāttvika) (avidyā). This is just as a clever washerman, removing impurity with (another) impurity, (remains skilled).

Words meanings summery:

• अविद्याम् (avidyām) - the supreme or actual nescience (avidyā) that needs to be removed (nescience, ignorance)

• श्रेष्ठया (śreṣṭhayā) - by means of the superior or higher (avidyā, implied, e.g., knowledge from śāstras) (by the best, by the most excellent, by the superior)

• श्रेष्ठाम् (śreṣṭhām) - the supreme or actual (nescience (avidyā)) (the best, the most excellent, the superior)

• क्षालयत् (kṣālayat) - washing away, cleansing

• इह (iha) - here, in this (world/context)

• तिष्ठति (tiṣṭhati) - remains, stands, stays

• मलम् (malam) - dirt, impurity, stain

• मलेन (malena) - by means of another impurity (used to remove a different impurity) (by dirt, by impurity)

• अपहरन् (apaharan) - removing, taking away

• युक्तिज्ञः (yuktijñaḥ) - a washerman skilled in the proper method (knowing the method, skilled in means)

• रजकः (rajakaḥ) - washerman, dyer

• यथा (yathā) - just as, as

Words meanings and morphology

अविद्याम् (avidyām) - the supreme or actual nescience (avidyā) that needs to be removed (nescience, ignorance)

(noun)

Accusative, feminine, singular of avidyā

avidyā - nescience, ignorance, non-knowledge

श्रेष्ठया (śreṣṭhayā) - by means of the superior or higher (avidyā, implied, e.g., knowledge from śāstras) (by the best, by the most excellent, by the superior)

(adjective)

Instrumental, feminine, singular of śreṣṭha

śreṣṭha - best, most excellent, superior, chief

श्रेष्ठाम् (śreṣṭhām) - the supreme or actual (nescience (avidyā)) (the best, the most excellent, the superior)

(adjective)

Accusative, feminine, singular of śreṣṭha

śreṣṭha - best, most excellent, superior, chief

क्षालयत् (kṣālayat) - washing away, cleansing

(adjective)

Nominative, masculine, singular of kṣālayant

kṣālayant - washing, cleansing

present active participle

causative stem of kṣal + śatṛ suffix

Root: kṣal (class 1)

इह (iha) - here, in this (world/context)

(indeclinable)

तिष्ठति (tiṣṭhati) - remains, stands, stays

(verb)

3rd person , singular, active, present (lat) of sthā

Root: sthā (class 1)

मलम् (malam) - dirt, impurity, stain

(noun)

Accusative, neuter, singular of mala

mala - dirt, impurity, stain, defilement

मलेन (malena) - by means of another impurity (used to remove a different impurity) (by dirt, by impurity)

(noun)

Instrumental, neuter, singular of mala

mala - dirt, impurity, stain, defilement

अपहरन् (apaharan) - removing, taking away

(adjective)

Nominative, masculine, singular of apaharant

apaharant - removing, taking away, carrying off

present active participle

apa + hṛ + śatṛ suffix

Prefix: apa

Root: hṛ (class 1)

युक्तिज्ञः (yuktijñaḥ) - a washerman skilled in the proper method (knowing the method, skilled in means)

(noun)

Nominative, masculine, singular of yuktijña

yuktijña - knowing the right method, skilled in means, ingenious

Compound type : tatpuruṣa (yukti+jña)

• yukti – method, means, right course, reasoning
  noun (feminine)
• jña – knowing, acquainted with, wise
  adjective
  Root: jñā (class 9)

रजकः (rajakaḥ) - washerman, dyer

(noun)

Nominative, masculine, singular of rajaka

rajaka - washerman, dyer

यथा (yathā) - just as, as

(indeclinable)