योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-22, verse-51

सर्गान्निरर्गलाचारान्क्वचित्कांश्चित्स्मराम्यहम् ।
ध्यातरि ब्रह्मणो ब्रह्मन्ससुरासुरमानुषम् ॥ ५१ ॥

sargānnirargalācārānkvacitkāṃścitsmarāmyaham ,
dhyātari brahmaṇo brahmansasurāsuramānuṣam 51

51. sargān nirargalācārān kvacit kāṃścit smarāmi aham
dhyātari brahmaṇaḥ brahman sasurāsuramānuṣam

51. brahman! aham kvacit nirargalācārān sasurāsuramānuṣam
brahmaṇaḥ dhyātari kāṃścit sargān smarāmi

51. O Brahman, I recall some of these creations (sarga), which sometimes feature unrestrained activities and encompass gods, asuras, and humans, all arising within the meditator (dhyātṛ) of Brahmā (brahman).

Words meanings summery:

• सर्गान् (sargān) - creations, emanations, manifestations

• निरर्गलाचारान् (nirargalācārān) - of unrestrained actions, with unobstructed activities

• क्वचित् (kvacit) - sometimes, somewhere, in some way

• कांश्चित् (kāṁścit) - some, certain ones

• स्मरामि (smarāmi) - I remember, I recall

• अहम् (aham) - I

• ध्यातरि (dhyātari) - in the meditator, in the contemplator

• ब्रह्मणः (brahmaṇaḥ) - of Brahmā (the creator deity). (of Brahmā (the creator god), of the supreme being (brahman))

• ब्रह्मन् (brahman) - Address to the listener, likely a wise sage or the ultimate reality (brahman). In Yoga Vashishtha, addresses to the ultimate truth are common. (O Brahman!)

• ससुरासुरमानुषम् (sasurāsuramānuṣam) - Describes the nature of the creation (sarga) as encompassing these beings. (with gods, asuras, and humans)

Words meanings and morphology

सर्गान् (sargān) - creations, emanations, manifestations

(noun)

Accusative, masculine, plural of sarga

sarga - creation, emission, emanation, chapter

Derived from root sṛj (to emit, create) with suffix a.

Root: sṛj (class 6)

निरर्गलाचारान् (nirargalācārān) - of unrestrained actions, with unobstructed activities

(adjective)

Accusative, masculine, plural of nirargalācāra

nirargalācāra - having unobstructed conduct, having unrestricted activities

Compound type : bahuvrihi (nis+argala+ācāra)

• nis – without, out, free from
  indeclinable
• argala – bolt, hindrance, impediment
  noun (masculine)
• ācāra – conduct, behaviour, custom
  noun (masculine)
  Prefix: ā

क्वचित् (kvacit) - sometimes, somewhere, in some way

(indeclinable)

कांश्चित् (kāṁścit) - some, certain ones

(pronoun)

Accusative, masculine, plural of ka

ka - who, what, which

The particle cid added to an interrogative pronoun makes it indefinite.

स्मरामि (smarāmi) - I remember, I recall

(verb)

1st person , singular, active, present (laṭ) of smṛ

present active

1st person singular, present tense, active voice.

Root: smṛ (class 1)

अहम् (aham) - I

(pronoun)

Nominative, singular of asmad

asmad - I, we

ध्यातरि (dhyātari) - in the meditator, in the contemplator

(noun)

Locative, masculine, singular of dhyātṛ

dhyātṛ - meditator, one who contemplates

agent noun

Derived from root dhyā (to meditate) with agent suffix tṛ.

Root: dhyā (class 1)

ब्रह्मणः (brahmaṇaḥ) - of Brahmā (the creator deity). (of Brahmā (the creator god), of the supreme being (brahman))

(proper noun)

Genitive, masculine, singular of brahman

brahman - Brahmā (creator god), the ultimate reality (brahman), priest

Root: bṛh (class 1)

ब्रह्मन् (brahman) - Address to the listener, likely a wise sage or the ultimate reality (brahman). In Yoga Vashishtha, addresses to the ultimate truth are common. (O Brahman!)

(noun)

Vocative, singular of brahman

brahman - the ultimate reality (brahman), a sage, a priest

Root: bṛh (class 1)

ससुरासुरमानुषम् (sasurāsuramānuṣam) - Describes the nature of the creation (sarga) as encompassing these beings. (with gods, asuras, and humans)

(adjective)

Accusative, neuter, singular of sasurāsuramānuṣa

sasurāsuramānuṣa - existing with gods, asuras, and humans

Compound type : bahuvrihi (sa+sura+asura+mānuṣa)

• sa – with, together with
  indeclinable
• sura – god, deity
  noun (masculine)
• asura – demon, anti-god
  noun (masculine)
  Prefix: a
• mānuṣa – human, man
  noun (masculine)

Note: This accusative singular neuter form suggests it describes the 'world' or 'universe' (implied jagat/viśvam) that constitutes each sarga, or it functions adverbially.