योगवासिष्ठः yogavāsiṣṭhaḥ - book-1, chapter-26, verse-42

आकाशपादपलताकृतपाशकल्पं येषां फलं
नहि विचारविदोऽपि विद्मः ॥ ४२ ॥

ākāśapādapalatākṛtapāśakalpaṃ yeṣāṃ
phalaṃ nahi vicāravido'pi vidmaḥ 42

42. ākāśapādapalatākṛtapāśakalpam yeṣām
phalam na hi vicāravidaḥ api vidmaḥ

42. yeṣām phalam ākāśapādapalatākṛtapāśakalpam,
vicāravidaḥ api na hi vidmaḥ

42. The fruits of these (desires and actions) are like snares woven from the vines of a mythical sky-tree—non-existent and delusive. Even those among us who possess discriminative knowledge (viveka) do not truly understand their outcome.

Words meanings summery:

• आकाशपादपलताकृतपाशकल्पम् (ākāśapādapalatākṛtapāśakalpam) - illusory, non-existent, delusive (resembling a snare made of vines from a sky-tree)

• येषाम् (yeṣām) - whose, of which, of whom

• फलम् (phalam) - fruit, result, outcome

• न (na) - not, no

• हि (hi) - emphasis, certainty (indeed, certainly, for)

• विचारविदः (vicāravidaḥ) - those who possess discriminative knowledge (viveka) (those who know discrimination, skilled in investigation)

• अपि (api) - even, also, too

• विद्मः (vidmaḥ) - we know

Words meanings and morphology

आकाशपादपलताकृतपाशकल्पम् (ākāśapādapalatākṛtapāśakalpam) - illusory, non-existent, delusive (resembling a snare made of vines from a sky-tree)

(adjective)

Nominative, neuter, singular of ākāśapādapalatākṛtapāśakalpa

ākāśapādapalatākṛtapāśakalpa - like a snare made of vines from a sky-tree (a metaphor for something imaginary or impossible)

Compound type : bahuvrihi (ākāśapādapalatākṛtapāśa+kalpa)

• ākāśa – sky, ether, space
  noun (masculine)
  Root: kāś (class 1)
• pādapa – tree (literally: drinking by foot)
  noun (masculine)
• latā – creeper, vine
  noun (feminine)
• kṛta – done, made, created
  adjective (neuter)
  Past Passive Participle
  from root kṛ
  Root: kṛ (class 8)
• pāśa – snare, noose, bond
  noun (masculine)
• kalpa – like, resembling, similar to
  adjective (neuter)

Note: qualifying "phalam"

येषाम् (yeṣām) - whose, of which, of whom

(pronoun)

Genitive, masculine, plural of yad

yad - which, who, what

Note: refers to people or their actions from previous verse

फलम् (phalam) - fruit, result, outcome

(noun)

Nominative, neuter, singular of phala

phala - fruit, result, consequence, outcome

Note: Subject of the implied verb of being.

न (na) - not, no

(indeclinable)

हि (hi) - emphasis, certainty (indeed, certainly, for)

(indeclinable)

Note: Emphatic particle.

विचारविदः (vicāravidaḥ) - those who possess discriminative knowledge (viveka) (those who know discrimination, skilled in investigation)

(noun)

Nominative, masculine, plural of vicāravid

vicāravid - one who knows discrimination/investigation, wise in deliberation

Compound type : tatpurusha (vicāra+vid)

• vicāra – discrimination, deliberation, investigation, thought
  noun (masculine)
  Prefix: vi
  Root: car (class 1)
• vid – knower, knowing
  adjective (masculine)
  root vid (to know)
  Root: vid (class 2)

Note: Subject of "vidmaḥ"

अपि (api) - even, also, too

(indeclinable)

Note: Emphasizes "vicāravidaḥ".

विद्मः (vidmaḥ) - we know

(verb)

1st person , plural, active, present (laṭ) of vid

Root: vid (class 2)