योगवासिष्ठः yogavāsiṣṭhaḥ - book-4, chapter-33, verse-34

अयं सोऽहमिति स्फारान्मोहादन्यतरत्तमः ।
अनर्थभूतं संसारे न भूतं न भविष्यति ॥ ३४ ॥

ayaṃ so'hamiti sphārānmohādanyatarattamaḥ ,
anarthabhūtaṃ saṃsāre na bhūtaṃ na bhaviṣyati 34

34. ayam saḥ aham iti sphārāt mohāt anyatarattamaḥ
anarthabhūtam saṃsāre na bhūtam na bhaviṣyati

34. saḥ ayam aham iti sphārāt mohāt anyatarattamaḥ (asti).
saṃsāre anarthabhūtam (ca asti).
(īdṛśam kiñcit) na bhūtam na bhaviṣyati (ca).

34. This concept "I am that" (ayam so 'ham), stemming from vast delusion, is the most calamitous thing in the cycle of transmigration (saṃsāra); nothing like it has ever existed, nor will it ever exist.

Words meanings summery:

• अयम् (ayam) - this (masculine)

• सः (saḥ) - that (masculine)

• अहम् (aham) - I

• इति (iti) - thus, so, often used to quote

• स्फारात् (sphārāt) - from the expansion, from the swelling

• मोहात् (mohāt) - from delusion, from infatuation

• अन्यतरत्तमः (anyatarattamaḥ) - the worst of all

• अनर्थभूतम् (anarthabhūtam) - a source of calamity, misfortune, evil

• संसारे (saṁsāre) - in the cycle of transmigration (saṃsāra)

• न (na) - not, no

• भूतम् (bhūtam) - has been, existed (neuter)

• न (na) - not, no

• भविष्यति (bhaviṣyati) - will be, will exist

Words meanings and morphology

अयम् (ayam) - this (masculine)

(pronoun)

Nominative, masculine, singular of idam

idam - this, here

Demonstrative pronoun

Note: Refers to the "I am that" notion.

सः (saḥ) - that (masculine)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

Demonstrative pronoun

Note: Forms part of the "I am that" phrase.

अहम् (aham) - I

(pronoun)

Nominative, singular of aham

aham - I, myself

First person singular pronoun

Note: Forms part of the "I am that" phrase.

इति (iti) - thus, so, often used to quote

(indeclinable)

Note: Marks the quoted phrase "I am that".

स्फारात् (sphārāt) - from the expansion, from the swelling

(noun)

Ablative, masculine, singular of sphāra

sphāra - swelling, expansion, abundance

From root sphāy 'to swell'

Root: sphāy (class 1)

Note: Indicates cause, "from the expansion (of delusion)".

मोहात् (mohāt) - from delusion, from infatuation

(noun)

Ablative, masculine, singular of moha

moha - delusion, infatuation, bewilderment

From root muh 'to be bewildered'

Root: muh (class 4)

Note: Indicates cause, "from delusion".

अन्यतरत्तमः (anyatarattamaḥ) - the worst of all

(adjective)

Nominative, masculine, singular of anyatarattama

anyatarattama - the worst among many, worst of all

Formed from anyatara (one of two) + -tama (superlative suffix for more than two)

Note: Predicative adjective for the "I am that" notion.

अनर्थभूतम् (anarthabhūtam) - a source of calamity, misfortune, evil

(noun)

Nominative, neuter, singular of anarthabhūta

anarthabhūta - a source of calamity, misfortune, evil

From anartha (misfortune, evil) + bhūta (become, being)

Compound type : tatpuruṣa (anartha+bhūta)

• anartha – misfortune, evil, meaninglessness
  noun (masculine)
  From negative prefix an + artha (purpose, wealth, meaning)
  Prefix: an
• bhūta – being, existing, past, creature, element
  adjective
  Past Passive Participle
  From root bhū 'to be'
  Root: bhū (class 1)

Note: Predicative noun for the "I am that" notion.

संसारे (saṁsāre) - in the cycle of transmigration (saṃsāra)

(noun)

Locative, masculine, singular of saṃsāra

saṁsāra - transmigration, cycle of birth and death

From sam + sṛ 'to flow'

Prefix: sam

Root: sṛ (class 1)

Note: Indicates the sphere or context.

न (na) - not, no

(indeclinable)

भूतम् (bhūtam) - has been, existed (neuter)

(adjective)

Nominative, neuter, singular of bhūta

bhūta - been, existed, past, creature, element

Past Passive Participle

From root bhū 'to be'

Root: bhū (class 1)

Note: Subject of implied 'asti'.

न (na) - not, no

(indeclinable)

भविष्यति (bhaviṣyati) - will be, will exist

(verb)

3rd person , singular, active, future (lṛṭ) of bhū

Future active indicative

Root: bhū (class 1)