योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-26, verse-18

अव्यवच्छिन्ननिर्भागसंविन्मात्रं जगत्त्रयम् ।
विद्धि शान्तं तथा व्योम यथा वारिणि पर्वतम् ॥ १८ ॥

avyavacchinnanirbhāgasaṃvinmātraṃ jagattrayam ,
viddhi śāntaṃ tathā vyoma yathā vāriṇi parvatam 18

18. avyavacchinnanirbhāgasaṃvinmātram jagattrayam
viddhi śāntam tathā vyoma yathā vāriṇi parvatam

18. viddhi jagattrayam avyavacchinnanirbhāgasaṃvinmātram śāntam,
yathā vyoma,
tathā yathā vāriṇi parvatam

18. Know the three worlds (jagattraya) to be merely consciousness (saṃvit), which is uninterrupted, without parts, and peaceful; just as space (vyoma) is (inherently peaceful), and just as a mountain (appears reflected) in water.

Words meanings summery:

• अव्यवच्छिन्ननिर्भागसंविन्मात्रम् (avyavacchinnanirbhāgasaṁvinmātram) - merely consciousness, uninterrupted and without parts (merely consciousness (saṃvit) without break or parts)

• जगत्त्रयम् (jagattrayam) - the three worlds (the three worlds, the three realms)

• विद्धि (viddhi) - know, realize (know, understand, realize)

• शान्तम् (śāntam) - peaceful, tranquil (peaceful, calm, tranquil, quieted)

• तथा (tathā) - similarly (similarly, so, thus, in that way)

• व्योम (vyoma) - space (as inherently peaceful) (sky, space, atmosphere)

• यथा (yathā) - just as (as, just as, in the way that)

• वारिणि (vāriṇi) - in water (in water, on water)

• पर्वतम् (parvatam) - a mountain (as a reflection) (mountain, hill)

Words meanings and morphology

अव्यवच्छिन्ननिर्भागसंविन्मात्रम् (avyavacchinnanirbhāgasaṁvinmātram) - merely consciousness, uninterrupted and without parts (merely consciousness (saṃvit) without break or parts)

(adjective)

Nominative, neuter, singular of avyavacchinnanirbhāgasaṃvinmātra

avyavacchinnanirbhāgasaṁvinmātra - merely consciousness without interruption or parts

Compound type : karmadhāraya (avyavacchinna+nirbhāga+saṃvit+mātra)

• a – not, un-
  indeclinable
  Negative prefix.
• vyavacchinna – separated, interrupted, cut off
  adjective (masculine)
  Past Passive Participle
  From root chid (to cut) with upasargas vi-ava-.
  Prefixes: vi+ava
  Root: chid (class 7)
• nirbhāga – without parts, indivisible
  adjective (masculine)
  From 'nis' (without) and 'bhāga' (part).
  Prefix: nis
• saṃvit – consciousness, knowledge
  noun (feminine)
  From root vid (to know) with upasarga sam-.
  Prefix: sam
  Root: vid (class 2)
• mātra – only, merely, just, measure
  indeclinable
  Suffix indicating 'only' or 'mere'.

Note: Predicative adjective for 'jagattrayam'.

जगत्त्रयम् (jagattrayam) - the three worlds (the three worlds, the three realms)

(noun)

Accusative, neuter, singular of jagattraya

jagattraya - the three worlds, the three realms (earth, atmosphere, heaven)

Compound type : dvigu (jagat+traya)

• jagat – world, universe
  noun (neuter)
  From root gam (to go).
  Root: gam (class 1)
• traya – threefold, trio, group of three
  noun (neuter)
  From 'tri' (three) with suffix '-ya'.

Note: Object of the imperative verb 'viddhi'.

विद्धि (viddhi) - know, realize (know, understand, realize)

(verb)

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

Root: vid (class 2)

शान्तम् (śāntam) - peaceful, tranquil (peaceful, calm, tranquil, quieted)

(adjective)

Accusative, neuter, singular of śānta

śānta - peaceful, calm, tranquil, quieted, ceased

Past Passive Participle

From root śam (to be quiet, calm, cease).

Root: śam (class 4)

Note: Agreement with 'jagattrayam'.

तथा (tathā) - similarly (similarly, so, thus, in that way)

(indeclinable)

व्योम (vyoma) - space (as inherently peaceful) (sky, space, atmosphere)

(noun)

Nominative, neuter, singular of vyoman

vyoman - sky, space, atmosphere, ether

Note: Subject of the first simile (implied 'is peaceful').

यथा (yathā) - just as (as, just as, in the way that)

(indeclinable)

वारिणि (vāriṇi) - in water (in water, on water)

(noun)

Locative, neuter, singular of vāri

vāri - water

Note: Locative for the second simile.

पर्वतम् (parvatam) - a mountain (as a reflection) (mountain, hill)

(noun)

Accusative, masculine, singular of parvata

parvata - mountain, hill

Note: Object of an implied verb like 'appears' or 'is seen' in the reflection simile.