योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-73, verse-54

प्रतिच्छन्दशरीराणां प्रथमं बीजमेष सः ।
जगद्गतानां सर्वेषामाकल्पव्यवहारिणाम् ॥ ५४ ॥

praticchandaśarīrāṇāṃ prathamaṃ bījameṣa saḥ ,
jagadgatānāṃ sarveṣāmākalpavyavahāriṇām 54

54. prati-cchanda-śarīrāṇām prathamam bījam eṣaḥ saḥ
| jagat-gatānām sarveṣām ā-kalpa-vyavahāriṇām

54. eṣaḥ saḥ prathamam bījam.
sarveṣām jagat-gatānām ā-kalpa-vyavahāriṇām prati-cchanda-śarīrāṇām (ca bījam asti).

54. This very principle (eṣaḥ saḥ) is the primordial seed (bījam) for all reflected forms or illusory bodies (praticchanda-śarīrāṇām) that exist throughout the world (jagat-gatānām) and endure through aeons (kalpa) of activity.

Words meanings summery:

• प्रति-च्छन्द-शरीराणाम् (prati-cchanda-śarīrāṇām) - of reflected bodies, of illusory bodies

• प्रथमम् (prathamam) - first, primordial

• बीजम् (bījam) - seed, origin, cause

• एषः (eṣaḥ) - this one

• सः (saḥ) - that one, he

• जगत्-गतानाम् (jagat-gatānām) - of those existing in the world

• सर्वेषाम् (sarveṣām) - of all

• आ-कल्प-व्यवहारिणाम् (ā-kalpa-vyavahāriṇām) - of those acting until the end of a cosmic cycle

Words meanings and morphology

प्रति-च्छन्द-शरीराणाम् (prati-cchanda-śarīrāṇām) - of reflected bodies, of illusory bodies

(noun)

Genitive, neuter, plural of prati-cchanda-śarīra

prati-cchanda-śarīra - reflected body, illusory body, image-body

Compound type : tatpuruṣa (prati-cchanda+śarīra)

• prati-cchanda – reflection, image, copy, likeness
  noun (masculine)
  Prefix: prati
  Root: chand (class 1)
• śarīra – body, corporeal frame
  noun (neuter)

प्रथमम् (prathamam) - first, primordial

(adjective)

Nominative, neuter, singular of prathama

prathama - first, foremost, primary, principal

बीजम् (bījam) - seed, origin, cause

(noun)

Nominative, neuter, singular of bīja

bīja - seed, germ, origin, cause, element

एषः (eṣaḥ) - this one

(pronoun)

Nominative, masculine, singular of etas

etas - this

सः (saḥ) - that one, he

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

जगत्-गतानाम् (jagat-gatānām) - of those existing in the world

(adjective)

Genitive, masculine, plural of jagat-gata

jagat-gata - gone into the world, existing in the world

Compound type : tatpuruṣa (jagat+gata)

• jagat – world, universe
  noun (neuter)
  Present Active Participle (substantivized)
  Derived from root gam (to go, move)
  Root: gam (class 1)
• gata – gone, entered, existing, arrived
  adjective (masculine)
  Past Passive Participle
  Derived from root gam (to go, move)
  Root: gam (class 1)

सर्वेषाम् (sarveṣām) - of all

(pronoun)

Genitive, masculine, plural of sarva

sarva - all, every, whole

आ-कल्प-व्यवहारिणाम् (ā-kalpa-vyavahāriṇām) - of those acting until the end of a cosmic cycle

(noun)

Genitive, masculine, plural of ā-kalpa-vyavahārin

ā-kalpa-vyavahārin - one who acts/operates until a kalpa (cosmic aeon)

Compound type : tatpuruṣa (ā-kalpa+vyavahārin)

• ā-kalpa – until a cosmic cycle (kalpa)
  indeclinable
  Prefix: ā
• vyavahārin – one who acts, transacts, deals, practises
  noun (masculine)
  Agent noun from root hṛ (to carry) with prefixes vi-ava
  Prefixes: vi+ava
  Root: hṛ (class 1)