योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-49, verse-21

पिशाचराजी राजानं तस्य यावद्विदूरथम् ।
समाक्रामति तावत्तां मायां स बुबुधे बुधः ॥ २१ ॥

piśācarājī rājānaṃ tasya yāvadvidūratham ,
samākrāmati tāvattāṃ māyāṃ sa bubudhe budhaḥ 21

21. piśāca-rājī rājānam tasya yāvat vidūratham
samākrāmati tāvat tām māyām saḥ bubudhe budhaḥ

21. yāvat piśāca-rājī tasya rājānam vidūratham samākrāmati,
tāvat saḥ budhaḥ tām māyām bubudhe

21. While that multitude of demons assailed King Vidūratha, the wise one immediately recognized that illusion (māyā).

Words meanings summery:

• पिशाच-राजी (piśāca-rājī) - a host/multitude of demons/goblins

• राजानम् (rājānam) - the king

• तस्य (tasya) - his, its, of that

• यावत् (yāvat) - while (as long as, as far as, while)

• विदूरथम् (vidūratham) - Vidūratha

• समाक्रामति (samākrāmati) - assails, attacks, approaches

• तावत् (tāvat) - then, immediately (so long, then, at that time)

• ताम् (tām) - that (feminine singular accusative)

• मायाम् (māyām) - illusion, magic, deception (māyā)

• सः (saḥ) - he, that

• बुबुधे (bubudhe) - understood, perceived, awoke

• बुधः (budhaḥ) - the wise one, a learned person

Words meanings and morphology

पिशाच-राजी (piśāca-rājī) - a host/multitude of demons/goblins

(noun)

Nominative, feminine, singular of piśāca-rāji

piśāca-rāji - host/multitude of demons

Compound type : Tatpuruṣa (piśāca+rāji)

• piśāca – demon, goblin, ghoul
  noun (masculine)
• rāji – line, row, range, multitude, host
  noun (feminine)
  Root: rāj

राजानम् (rājānam) - the king

(noun)

Accusative, masculine, singular of rājan

rājan - king, ruler

Root: rāj

तस्य (tasya) - his, its, of that

(pronoun)

Genitive, masculine, singular of tad

tad - that, he, she, it

Note: Refers to Vidūratha.

यावत् (yāvat) - while (as long as, as far as, while)

(indeclinable)

विदूरथम् (vidūratham) - Vidūratha

(proper noun)

Accusative, masculine, singular of Vidūratha

Vidūratha - name of a king

Note: Appears to be the object of samākrāmati.

समाक्रामति (samākrāmati) - assails, attacks, approaches

(verb)

3rd person , singular, active, present (laṭ) of kram

Present Tense

from root √kram (to step) with prefixes sam-ā

Prefixes: sam+ā

Root: kram (class 1)

तावत् (tāvat) - then, immediately (so long, then, at that time)

(indeclinable)

ताम् (tām) - that (feminine singular accusative)

(pronoun)

Accusative, feminine, singular of tad

tad - that, she, it

मायाम् (māyām) - illusion, magic, deception (māyā)

(noun)

Accusative, feminine, singular of māyā

māyā - illusion, magic, artifice, deception (māyā)

Root: mā

सः (saḥ) - he, that

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

बुबुधे (bubudhe) - understood, perceived, awoke

(verb)

3rd person , singular, middle, perfect (liṭ) of budh

Perfect Tense

from root √budh (to know, perceive)

Root: budh (class 1)

बुधः (budhaḥ) - the wise one, a learned person

(noun)

Nominative, masculine, singular of budha

budha - wise, learned, a wise man, Mercury

from root √budh

Root: budh