योगवासिष्ठः yogavāsiṣṭhaḥ - book-4, chapter-54, verse-15

पुष्पाक्रान्तौ करस्पन्दयत्नः पुत्रोपयुज्यते ।
तदप्युपकरोत्यस्मिन्न संकल्पपरिक्षये ॥ १५ ॥

puṣpākrāntau karaspandayatnaḥ putropayujyate ,
tadapyupakarotyasminna saṃkalpaparikṣaye 15

15. puṣpa-ākrāntau kara-spanda-yatnaḥ putra upayujyate
tat api upakaroti asmin na saṃkalpa-parikṣaye

15. putra,
puṣpa-ākrāntau kara-spanda-yatnaḥ upayujyate tat api asmin saṃkalpa-parikṣaye na upakaroti

15. Son, for pressing (or handling) flowers, the effort of a hand's movement is indeed employed. However, even that (slight physical effort) is not helpful in this complete dissipation of resolve (saṃkalpa).

Words meanings summery:

• पुष्प-आक्रान्तौ (puṣpa-ākrāntau) - in the context of an attack (or pressing) on flowers (in the pressing/handling of flowers)

• कर-स्पन्द-यत्नः (kara-spanda-yatnaḥ) - effort of hand movement

• पुत्र (putra) - O son

• उपयुज्यते (upayujyate) - is indeed employed (is employed, is used, is useful)

• तत् (tat) - even that (slight physical effort) (that, even that)

• अपि (api) - even (even, also, too)

• उपकरोति (upakaroti) - is helpful (helps, benefits, is useful)

• अस्मिन् (asmin) - in this (context of dissipation) (in this)

• न (na) - not, no

• संकल्प-परिक्षये (saṁkalpa-parikṣaye) - in the complete destruction/dissipation of resolve

Words meanings and morphology

पुष्प-आक्रान्तौ (puṣpa-ākrāntau) - in the context of an attack (or pressing) on flowers (in the pressing/handling of flowers)

(noun)

Locative, feminine, singular of puṣpa-ākrānti

puṣpa-ākrānti - attack/pressing/handling of flowers

Compound type : tatpurusha (puṣpa+ākrānti)

• puṣpa – flower
  noun (neuter)
• ākrānti – attack, assault, pressing, handling
  noun (feminine)
  From ā-kram
  Prefix: ā
  Root: kram (class 1)

Note: Denotes the circumstance.

कर-स्पन्द-यत्नः (kara-spanda-yatnaḥ) - effort of hand movement

(noun)

Nominative, masculine, singular of kara-spanda-yatna

kara-spanda-yatna - effort of hand movement

Compound type : tatpurusha (kara+spanda+yatna)

• kara – hand
  noun (masculine)
• spanda – tremor, vibration, movement
  noun (masculine)
  From root √spand
  Root: spand (class 1)
• yatna – effort, exertion
  noun (masculine)
  From root √yat
  Root: yat (class 1)

Note: Subject of upayujyate.

पुत्र (putra) - O son

(noun)

Vocative, masculine, singular of putra

putra - son, child

उपयुज्यते (upayujyate) - is indeed employed (is employed, is used, is useful)

(verb)

3rd person , singular, passive, present indicative (laṭ) of upayuj

Passive voice formation.

Prefix: upa

Root: yuj (class 7)

तत् (tat) - even that (slight physical effort) (that, even that)

(pronoun)

Nominative, neuter, singular of tad

tad - that, this

अपि (api) - even (even, also, too)

(indeclinable)

उपकरोति (upakaroti) - is helpful (helps, benefits, is useful)

(verb)

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

Prefix: upa

Root: kṛ (class 8)

अस्मिन् (asmin) - in this (context of dissipation) (in this)

(pronoun)

Locative, neuter, singular of idam

idam - this, here

न (na) - not, no

(indeclinable)

Note: Nullifies upakaroti.

संकल्प-परिक्षये (saṁkalpa-parikṣaye) - in the complete destruction/dissipation of resolve

(noun)

Locative, masculine, singular of saṃkalpa-parikṣaya

saṁkalpa-parikṣaya - complete destruction, dissipation of resolve

Compound type : tatpurusha (saṃkalpa+parikṣaya)

• saṃkalpa – resolve, intention, mental construct (saṃkalpa)
  noun (masculine)
  From sam-kḷp
  Prefix: sam
  Root: kḷp (class 1)
• parikṣaya – complete destruction, decay, dissipation
  noun (masculine)
  From pari-kṣi
  Prefix: pari
  Root: kṣi (class 1)

Note: Nullifies upakaroti.