योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-113, verse-50

उन्मत्तरववेतालनर्तनारम्भसंभ्रमम् ।
स्थाणवः संप्रयच्छन्ति मूका अप्येतयान्धया ॥ ५० ॥

unmattaravavetālanartanārambhasaṃbhramam ,
sthāṇavaḥ saṃprayacchanti mūkā apyetayāndhayā 50

50. unmattaravavetālanartanārambhasaṃbhramam
sthāṇavaḥ saṃprayacchanti mūkāḥ api etayā andhayā

50. etayā andhayā mūkāḥ api sthāṇavaḥ
unmattaravavetālanartanārambhasaṃbhramam saṃprayacchanti

50. Even mute, inert objects (sthāṇavaḥ), by means of this blind (entity), generate the tumultuous agitation that marks the beginning of the dance of frenzied, howling goblins.

Words meanings summery:

• उन्मत्तरववेतालनर्तनारम्भसंभ्रमम् (unmattaravavetālanartanārambhasaṁbhramam) - great agitation/confusion at the start of the dance of frenzied, howling goblins

• स्थाणवः (sthāṇavaḥ) - inert things, inanimate objects, logs, trunks

• संप्रयच्छन्ति (saṁprayacchanti) - bestow, grant, cause, give

• मूकाः (mūkāḥ) - mute, silent

• अपि (api) - even, also

• एतया (etayā) - by this (feminine)

• अन्धया (andhayā) - by the blind (feminine)

Words meanings and morphology

उन्मत्तरववेतालनर्तनारम्भसंभ्रमम् (unmattaravavetālanartanārambhasaṁbhramam) - great agitation/confusion at the start of the dance of frenzied, howling goblins

(noun)

Accusative, masculine, singular of unmattaravavetālanartanārambhasaṃbhrama

unmattaravavetālanartanārambhasaṁbhrama - great agitation at the commencement of the dance of frenzied, roaring (or shouting) vetālas (goblins)

Compound type : tatpuruṣa (unmatta+rava+vetāla+nartana+ārambha+saṃbhrama)

• unmatta – frenzied, mad, intoxicated, wild
  adjective
  Past Passive Participle
  Derived from root 'mad' with prefix 'ud'
  Prefix: ud
  Root: mad (class 4)
• rava – roar, cry, sound, noise
  noun (masculine)
• vetāla – goblin, vampire, ghost, demon
  noun (masculine)
• nartana – dance, dancing
  noun (neuter)
  Derived from root 'nṛt'
  Root: nṛt (class 4)
• ārambha – beginning, commencement, undertaking
  noun (masculine)
  Derived from root 'rabh' with prefix 'ā'
  Prefix: ā
  Root: rabh (class 1)
• saṃbhrama – agitation, confusion, flurry, tumult, haste
  noun (masculine)
  Derived from root 'bhram' with prefix 'sam'
  Prefix: sam
  Root: bhram (class 1)

Note: Direct object of 'saṃprayacchanti'.

स्थाणवः (sthāṇavaḥ) - inert things, inanimate objects, logs, trunks

(noun)

Nominative, masculine, plural of sthāṇu

sthāṇu - post, pillar, trunk of a tree, inanimate object, inert thing, immobile object

Note: Subject of 'saṃprayacchanti'.

संप्रयच्छन्ति (saṁprayacchanti) - bestow, grant, cause, give

(verb)

3rd person , plural, active, present indicative (laṭ) of saṃprayacch

Derived from root 'yam' with prefixes 'sam' and 'pra'

Prefixes: sam+pra

Root: yam (class 1)

मूकाः (mūkāḥ) - mute, silent

(adjective)

Nominative, masculine, plural of mūka

mūka - mute, dumb, silent, speechless

Note: Agrees with 'sthāṇavaḥ'.

अपि (api) - even, also

(indeclinable)

एतया (etayā) - by this (feminine)

(pronoun)

Instrumental, feminine, singular of etad

etad - this, that

Note: Instrumental case, referring to a preceding feminine noun (e.g., bhāvanā, śakti).

अन्धया (andhayā) - by the blind (feminine)

(adjective)

Instrumental, feminine, singular of andha

andha - blind, ignorant, obscured

Note: Agrees with 'etayā'.