योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-98, verse-10

पतितोऽवश एवाशु महत्यन्धोऽन्धकूपके ।
कृष्णरात्रितमोभीमे नभोगम्भीरकोटरे ॥ १० ॥

patito'vaśa evāśu mahatyandho'ndhakūpake ,
kṛṣṇarātritamobhīme nabhogambhīrakoṭare 10

10. patitaḥ avaśaḥ eva āśu mahati andhaḥ andhakūpake
kṛṣṇarātritamobhīme nabhogambhīrakoṭare

10. andhaḥ avaśaḥ eva āśu mahati kṛṣṇarātritamobhīme
nabhogambhīrakoṭare andhakūpake patitaḥ

10. Blind and helpless, he quickly fell into a vast, dark, blind well, terrifying with the darkness of a moonless night, and a hollow as deep as the sky.

Words meanings summery:

• पतितः (patitaḥ) - fallen

• अवशः (avaśaḥ) - helpless, powerless

• एव (eva) - indeed, only, just, certainly

• आशु (āśu) - quickly, swiftly

• महति (mahati) - in a great, in a vast

• अन्धः (andhaḥ) - blind, deluded

• अन्धकूपके (andhakūpake) - in the dark well of saṃsāra (implicitly) (in a blind well, in a dark pit)

• कृष्णरात्रितमोभीमे (kṛṣṇarātritamobhīme) - terrifying with the darkness of a dark night

• नभोगम्भीरकोटरे (nabhogambhīrakoṭare) - in a cavity deep as the sky

Words meanings and morphology

पतितः (patitaḥ) - fallen

(adjective)

Nominative, masculine, singular of patita

patita - fallen, descended, degraded

Past Passive Participle

derived from √pat (to fall)

Root: pat (class 1)

अवशः (avaśaḥ) - helpless, powerless

(adjective)

Nominative, masculine, singular of avaśa

avaśa - helpless, powerless, dependent, not in one's own power

Compound type : Tatpurusha (a+vaśa)

• a – not, un-
  indeclinable
• vaśa – will, power, control
  noun (masculine)

एव (eva) - indeed, only, just, certainly

(indeclinable)

आशु (āśu) - quickly, swiftly

(indeclinable)

Note: Used adverbially.

महति (mahati) - in a great, in a vast

(adjective)

Locative, neuter, singular of mahat

mahat - great, large, vast, mighty

Note: Modifies 'andhakūpake' which is masculine, so 'mahati' here acts as a masculine locative singular form of 'mahat' (e.g., 'mahati kūpe').

अन्धः (andhaḥ) - blind, deluded

(adjective)

Nominative, masculine, singular of andha

andha - blind, dark, ignorant, deluded

Note: Modifies the implied subject (he).

अन्धकूपके (andhakūpake) - in the dark well of saṃsāra (implicitly) (in a blind well, in a dark pit)

(noun)

Locative, masculine, singular of andhakūpaka

andhakūpaka - a blind well (a well covered so as to be unseen, or a deep, dark well), a dark pit

Compound type : Tatpurusha (andha+kūpaka)

• andha – blind, dark
  adjective (masculine)
• kūpaka – small well, pit
  noun (masculine)
  Diminutive of 'kūpa'.

कृष्णरात्रितमोभीमे (kṛṣṇarātritamobhīme) - terrifying with the darkness of a dark night

(adjective)

Locative, masculine, singular of kṛṣṇarātritamobhīma

kṛṣṇarātritamobhīma - terrifying due to the darkness of a moonless night

Compound type : Tatpurusha / Bahuvrihi (kṛṣṇarātri+tamas+bhīma)

• kṛṣṇarātri – dark night, moonless night
  noun (feminine)
• tamas – darkness, gloom
  noun (neuter)
• bhīma – terrifying, dreadful, formidable
  adjective (masculine)

Note: Modifies 'andhakūpake'.

नभोगम्भीरकोटरे (nabhogambhīrakoṭare) - in a cavity deep as the sky

(noun)

Locative, masculine, singular of nabhogambhīrakoṭara

nabhogambhīrakoṭara - a cavity or hollow as deep as the sky

Compound type : Tatpurusha (nabhas+gambhīra+koṭara)

• nabhas – sky, atmosphere
  noun (neuter)
• gambhīra – deep, profound
  adjective (masculine)
• koṭara – hollow, cavity, hole (especially in a tree)
  noun (masculine)

Note: Modifies 'andhakūpake'.