योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-163, verse-42

किलोपकुरुते यत्नात्तृणमात्रावगोपने ।
कथं सिध्यत्ययत्नेन त्रैलोक्यगणगोपनम् ॥ ४२ ॥

kilopakurute yatnāttṛṇamātrāvagopane ,
kathaṃ sidhyatyayatnena trailokyagaṇagopanam 42

42. kila upakurute yatnāt tṛṇamātrā avagopane
katham sidhyati ayatnena trailokyagaṇa gopanam

42. kila tṛṇamātrā avagopane yatnāt upakurute,
katham ayatnena trailokyagaṇa gopanam sidhyati?

42. Indeed, one endeavors diligently even to conceal a mere blade of grass. How then can the concealment of the entire host of the three worlds be accomplished effortlessly?

Words meanings summery:

• किल (kila) - indeed, even (indeed, verily, a particle denoting certainty or illustration)

• उपकुरुते (upakurute) - endeavors (does good, benefits, renders service, helps)

• यत्नात् (yatnāt) - diligently (from effort, with effort, diligently)

• तृणमात्रा (tṛṇamātrā) - a mere blade of grass (a mere blade of grass, only grass)

• अवगोपने (avagopane) - in concealing (in the act of hiding, in concealment)

• कथम् (katham) - how?

• सिध्यति (sidhyati) - can be accomplished (succeeds, is accomplished, is perfected)

• अयत्नेन (ayatnena) - effortlessly (without effort, effortlessly)

• त्रैलोक्यगण (trailokyagaṇa) - the entire host of the three worlds (the host of the three worlds)

• गोपनम् (gopanam) - concealment (concealment, hiding, protection)

Words meanings and morphology

किल (kila) - indeed, even (indeed, verily, a particle denoting certainty or illustration)

(indeclinable)

उपकुरुते (upakurute) - endeavors (does good, benefits, renders service, helps)

(verb)

3rd person , singular, middle, present (lat) of upakṛ

Prefix: upa

Root: kṛ (class 8)

यत्नात् (yatnāt) - diligently (from effort, with effort, diligently)

(noun)

Ablative, masculine, singular of yatna

yatna - effort, exertion, diligence, striving

तृणमात्रा (tṛṇamātrā) - a mere blade of grass (a mere blade of grass, only grass)

(adjective)

Nominative, feminine, singular of tṛṇamātra

tṛṇamātra - a mere blade of grass, consisting only of grass

Compound type : karmadhāraya (tṛṇa+mātra)

• tṛṇa – grass, a blade of grass, any small or insignificant thing
  noun (neuter)
• mātra – only, merely, no more than, measuring
  adjective (neuter)

Note: Here treated as feminine referring to a quantity or entity 'a mere (thing)'.

अवगोपने (avagopane) - in concealing (in the act of hiding, in concealment)

(noun)

Locative, neuter, singular of avagopana

avagopana - concealment, hiding

verbal noun

From 'ava-gup' (to hide, conceal) + lyuṭ suffix.

Prefix: ava

Root: gup (class 1)

कथम् (katham) - how?

(indeclinable)

सिध्यति (sidhyati) - can be accomplished (succeeds, is accomplished, is perfected)

(verb)

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

Root: sidh (class 4)

अयत्नेन (ayatnena) - effortlessly (without effort, effortlessly)

(noun)

Instrumental, masculine, singular of ayatna

ayatna - without effort, ease

Compound type : tatpuruṣa (a+yatna)

• a – not, non-, un-
  prefix
• yatna – effort, exertion, diligence, striving
  noun (masculine)

त्रैलोक्यगण (trailokyagaṇa) - the entire host of the three worlds (the host of the three worlds)

(noun)

Nominative, masculine, singular of trailokyagaṇa

trailokyagaṇa - host of the three worlds

Compound type : tatpuruṣa (trailokya+gaṇa)

• trailokya – the three worlds (heaven, earth, and hell, or heaven, earth, and atmosphere)
  noun (neuter)
  From 'triloka' + ṣyaN suffix.
• gaṇa – host, multitude, collection, group
  noun (masculine)

गोपनम् (gopanam) - concealment (concealment, hiding, protection)

(noun)

Nominative, neuter, singular of gopana

gopana - concealing, guarding, protecting

verbal noun

From root 'gup' (to protect, hide) + lyuṭ suffix.

Root: gup (class 1)