योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-209, verse-24

सहस्राण्येकतां यान्ति तथा सैव सुषुप्तकम् ।
अन्यथा स्वप्नसंकल्पसेनानुभवसंस्मृतौ ॥ २४ ॥

sahasrāṇyekatāṃ yānti tathā saiva suṣuptakam ,
anyathā svapnasaṃkalpasenānubhavasaṃsmṛtau 24

24. sahasrāṇi ekatām yānti tathā sā eva suṣuptakam
anyathā svapnasaṃkalpasenānubhavasaṃsmṛtau

24. sahasrāṇi ekatām yānti.
tathā sā eva suṣuptakam (yāti).
anyathā svapnasaṃkalpasenānubhavasaṃsmṛtau (katham syāt)?

24. Thousands (of entities) merge into a single unity, and similarly, that very (consciousness) enters the state of deep sleep (suṣupti). Otherwise, how could there be the experience and recollection of a dream-imagined army?

Words meanings summery:

• सहस्राणि (sahasrāṇi) - thousands (of diverse entities or soldiers from the imagined army) (thousands, many)

• एकताम् (ekatām) - to oneness, to unity, to a single state

• यान्ति (yānti) - they merge (into) (they go, they attain, they merge)

• तथा (tathā) - thus, so, similarly

• सा (sā) - that (consciousness, referring to 'cit' from previous verse) (she, that)

• एव (eva) - indeed, only, just

• सुषुप्तकम् (suṣuptakam) - the state of deep sleep (suṣupti) (deep sleep, state of deep sleep)

• अन्यथा (anyathā) - otherwise, else, in a different manner

• स्वप्नसंकल्पसेनानुभवसंस्मृतौ (svapnasaṁkalpasenānubhavasaṁsmṛtau) - in the experience and recollection of a dream-imagined army

Words meanings and morphology

सहस्राणि (sahasrāṇi) - thousands (of diverse entities or soldiers from the imagined army) (thousands, many)

(noun)

Nominative, neuter, plural of sahasra

sahasra - thousand, a multitude, very many

एकताम् (ekatām) - to oneness, to unity, to a single state

(noun)

Accusative, feminine, singular of ekatā

ekatā - oneness, unity, identity, harmony

Noun formed from eka (one) with suffix -tā (state of being).

यान्ति (yānti) - they merge (into) (they go, they attain, they merge)

(verb)

3rd person , plural, active, present (lat) of yā

present active

3rd person plural present indicative active

Root: yā (class 2)

तथा (tathā) - thus, so, similarly

(indeclinable)

सा (sā) - that (consciousness, referring to 'cit' from previous verse) (she, that)

(pronoun)

Nominative, feminine, singular of tad

tad - that, she, it

एव (eva) - indeed, only, just

(indeclinable)

सुषुप्तकम् (suṣuptakam) - the state of deep sleep (suṣupti) (deep sleep, state of deep sleep)

(noun)

Accusative, neuter, singular of suṣuptaka

suṣuptaka - deep sleep, sound sleep

Derived from root svap (to sleep), suṣupta (past passive participle).

Root: svap (class 2)

अन्यथा (anyathā) - otherwise, else, in a different manner

(indeclinable)

स्वप्नसंकल्पसेनानुभवसंस्मृतौ (svapnasaṁkalpasenānubhavasaṁsmṛtau) - in the experience and recollection of a dream-imagined army

(noun)

Locative, feminine, dual of svapnasaṃkalpasenānubhavasaṃsmṛti

svapnasaṁkalpasenānubhavasaṁsmṛti - experience and recollection concerning a dream-imagined army

Compound type : tatpurusha (svapnasaṃkalpasenā+anubhava+saṃsmṛti)

• svapna – dream, sleep
  noun (masculine)
  Root: svap (class 2)
• saṃkalpa – intention, imagination, mental conception
  noun (masculine)
  Derived from root kḷp with prefix sam.
  Prefix: sam
  Root: kḷp (class 1)
• senā – army, host
  noun (feminine)
• anubhava – experience, perception
  noun (masculine)
  Derived from root bhū with prefix anu.
  Prefix: anu
  Root: bhū (class 1)
• saṃsmṛti – recollection, memory
  noun (feminine)
  Derived from root smṛ with prefix sam.
  Prefix: sam
  Root: smṛ (class 1)

Note: Locative dual refers to 'in (the case of) experience and recollection'.