योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-33, verse-16

अथ पातालमार्गेण विष्णुराह्लादिताग्रतः ।
पूजादेवगृहं तस्य प्रह्लादस्य समाययौ ॥ १६ ॥

atha pātālamārgeṇa viṣṇurāhlāditāgrataḥ ,
pūjādevagṛhaṃ tasya prahlādasya samāyayau 16

16. atha pātālamārgeṇa viṣṇuḥ āhlāditāgrataḥ
pūjādevagṛham tasya prahlādasya samāyayau

16. atha viṣṇuḥ pātālamārgeṇa āhlāditāgrataḥ
tasya prahlādasya pūjādevagṛham samāyayau

16. Then (atha), Lord Viṣṇu, delighted and appearing before (Prahlāda), arrived at Prahlāda's worship-house, via the path to the netherworlds (pātāla-mārga).

Words meanings summery:

• अथ (atha) - then, subsequently (then, next, now, therefore)

• पातालमार्गेण (pātālamārgeṇa) - by the path to the netherworlds

• विष्णुः (viṣṇuḥ) - Lord Viṣṇu (Viṣṇu (a major Hindu deity))

• आह्लादिताग्रतः (āhlāditāgrataḥ) - Viṣṇu, being delighted and appearing before (Prahlāda) (with delight foremost, being delighted and in front)

• पूजादेवगृहम् (pūjādevagṛham) - Prahlāda's personal temple or shrine (worship-house, temple)

• तस्य (tasya) - his (referring to Prahlāda) (of him, his, of that)

• प्रह्लादस्य (prahlādasya) - of Prahlāda

• समाययौ (samāyayau) - arrived at (came, approached, arrived)

Words meanings and morphology

अथ (atha) - then, subsequently (then, next, now, therefore)

(indeclinable)

पातालमार्गेण (pātālamārgeṇa) - by the path to the netherworlds

(noun)

Instrumental, masculine, singular of pātālamārga

pātālamārga - path to the netherworld (pātāla)

Compound type : tatpuruṣa (pātāla+mārga)

• pātāla – the netherworld, underworld
  noun (masculine)
• mārga – path, road, way
  noun (masculine)
  From root `mṛj` (to wipe, clear).
  Root: mṛj (class 2)

Note: Indicates the means or route.

विष्णुः (viṣṇuḥ) - Lord Viṣṇu (Viṣṇu (a major Hindu deity))

(proper noun)

Nominative, masculine, singular of viṣṇu

viṣṇu - Viṣṇu, the Preserver deity

आह्लादिताग्रतः (āhlāditāgrataḥ) - Viṣṇu, being delighted and appearing before (Prahlāda) (with delight foremost, being delighted and in front)

(adjective)

Nominative, masculine, singular of āhlāditāgrata

āhlāditāgrata - having delight in front, preceded by delight; delighted and appearing before

Compound `āhlādita` (pleased/delighted) + `agrataḥ` (in front of, foremost). Often adverbial in use.

Compound type : bahuvrīhi or tatpuruṣa like adverb (āhlādita+agrataḥ)

• āhlādita – delighted, gladdened, pleased
  adjective (masculine)
  Past Passive Participle
  From `ā` + root `hlad` (to rejoice, be glad).
  Prefix: ā
  Root: hlad (class 1)
• agrataḥ – in front, before, foremost
  indeclinable
  From `agra` (front) + `tas` suffix.

Note: Qualifies `Viṣṇuḥ`.

पूजादेवगृहम् (pūjādevagṛham) - Prahlāda's personal temple or shrine (worship-house, temple)

(noun)

Accusative, neuter, singular of pūjādevagṛha

pūjādevagṛha - house of worship for the deity, temple

Compound type : tatpuruṣa (pūjā+deva+gṛha)

• pūjā – worship, adoration, reverence
  noun (feminine)
  From root `pūj` (to worship).
  Root: pūj (class 10)
• deva – god, deity
  noun (masculine)
• gṛha – house, dwelling
  noun (neuter)

Note: Direct object of `samāyayau`.

तस्य (tasya) - his (referring to Prahlāda) (of him, his, of that)

(pronoun)

Genitive, masculine, singular of tad

tad - that, he, she, it

Note: Masculine singular genitive of `tad`.

प्रह्लादस्य (prahlādasya) - of Prahlāda

(proper noun)

Genitive, masculine, singular of prahlāda

prahlāda - Prahlāda (a devout devotee in Hindu mythology)

Note: Qualifies `pūjādevagṛham`.

समाययौ (samāyayau) - arrived at (came, approached, arrived)

(verb)

3rd person , singular, active, perfect (Lit) of samāyā

Perfect tense, third person singular, active voice

Root `yā` (to go) with prefixes `sam` and `ā`.

Prefixes: sam+ā

Root: yā (class 2)