योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-73, verse-28

दीपप्रभेवाविज्ञातगतिर्गत्याशु लीयते ।
अयःसूच्यां मातरीव तत्र निर्वृतिमेति सा ॥ २८ ॥

dīpaprabhevāvijñātagatirgatyāśu līyate ,
ayaḥsūcyāṃ mātarīva tatra nirvṛtimeti sā 28

28. dīpaprabhā iva avijñātagatiḥ gatyā āśu līyate
ayaḥsūcyām mātari iva tatra nirvṛtim eti sā

28. sā avijñātagatiḥ dīpaprabhā iva gatyā āśu
līyate tatra ayaḥsūcyām mātari iva nirvṛtim eti

28. It, whose movement is imperceptible, quickly merges by its own course, like the flame of a lamp. There, it attains complete tranquility (nirvṛti), just as an iron needle (merges) into its mother (ore).

Words meanings summery:

• दीपप्रभा (dīpaprabhā) - lamp flame, light of a lamp

• इव (iva) - like, as, as if

• अविज्ञातगतिः (avijñātagatiḥ) - whose movement is unperceived/imperceptible

• गत्या (gatyā) - by its course, by its movement

• आशु (āśu) - quickly, swiftly, immediately

• लीयते (līyate) - dissolves, merges, disappears, vanishes

• अयःसूच्याम् (ayaḥsūcyām) - in an iron needle

• मातरि (mātari) - in its mother lode or original source, like an ore (in the mother, in the origin/source)

• इव (iva) - like, as, as if

• तत्र (tatra) - there, in that place, in that state

• निर्वृतिम् (nirvṛtim) - tranquility, cessation, liberation (nirvṛti)

• एति (eti) - goes, attains, obtains, reaches

• सा (sā) - she, it (feminine singular)

Words meanings and morphology

दीपप्रभा (dīpaprabhā) - lamp flame, light of a lamp

(noun)

Nominative, feminine, singular of dīpaprabhā

dīpaprabhā - light of a lamp, lamp flame

Compound type : Tatpurusha (dīpa+prabhā)

• dīpa – lamp, light
  noun (masculine)
• prabhā – light, luster, radiance, splendor
  noun (feminine)

इव (iva) - like, as, as if

(indeclinable)

अविज्ञातगतिः (avijñātagatiḥ) - whose movement is unperceived/imperceptible

(adjective)

Nominative, feminine, singular of avijñātagati

avijñātagati - whose movement is unknown/unperceived, having an imperceptible course

Compound type : Bahuvrihi (a+vijñāta+gati)

• a – not, un-
  indeclinable
  Negative prefix
• vijñāta – known, perceived, understood
  adjective
  Past Passive Participle
  Derived from root jñā (to know) with upasarga vi-
  Prefix: vi
  Root: jñā (class 9)
• gati – movement, course, path, state, destiny
  noun (feminine)
  Derived from root gam (to go)
  Root: gam (class 1)

गत्या (gatyā) - by its course, by its movement

(noun)

Instrumental, feminine, singular of gati

gati - movement, course, path, state, destiny

Derived from root gam (to go)

Root: gam (class 1)

आशु (āśu) - quickly, swiftly, immediately

(indeclinable)

लीयते (līyate) - dissolves, merges, disappears, vanishes

(verb)

3rd person , singular, middle, present indicative (laṭ) of lī

Root: lī (class 4)

अयःसूच्याम् (ayaḥsūcyām) - in an iron needle

(noun)

Locative, feminine, singular of ayaḥsūcī

ayaḥsūcī - iron needle

Compound type : Tatpurusha (ayas+sūcī)

• ayas – iron, metal
  noun (neuter)
• sūcī – needle, index, indicator
  noun (feminine)

मातरि (mātari) - in its mother lode or original source, like an ore (in the mother, in the origin/source)

(noun)

Locative, feminine, singular of mātṛ

mātṛ - mother, parent, matrix, origin

इव (iva) - like, as, as if

(indeclinable)

तत्र (tatra) - there, in that place, in that state

(indeclinable)

निर्वृतिम् (nirvṛtim) - tranquility, cessation, liberation (nirvṛti)

(noun)

Accusative, feminine, singular of nirvṛti

nirvṛti - cessation, extinguishment, tranquility, bliss, liberation (nirvṛti)

Derived from root vṛt (to turn, exist) with upasarga nir- (out, away)

Prefix: nis

Root: vṛt (class 1)

एति (eti) - goes, attains, obtains, reaches

(verb)

3rd person , singular, active, present indicative (laṭ) of i

Root: i (class 2)

सा (sā) - she, it (feminine singular)

(pronoun)

Nominative, feminine, singular of tad

tad - that, she, it