योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-93, verse-47

अशनिस्वनघोषेण नगस्फोटरवेण च ।
ऐरावणनिनादेन सम्यग्ध्यानी न कम्पते ॥ ४७ ॥

aśanisvanaghoṣeṇa nagasphoṭaraveṇa ca ,
airāvaṇaninādena samyagdhyānī na kampate 47

47. aśanisvanaghoṣeṇa nagasphoṭaraveṇa ca
airāvaṇaninādena samyak dhyānī na kampate

47. aśanisvanaghoṣeṇa nagasphoṭaraveṇa ca
airāvaṇaninādena samyak dhyānī na kampate

47. A perfectly meditating person (dhyānī) does not tremble, even amidst the sound of thunderbolts, the roar of exploding mountains, and the trumpet of Airāvata.

Words meanings summery:

• अशनिस्वनघोषेण (aśanisvanaghoṣeṇa) - by the sound of thunderbolts

• नगस्फोटरवेण (nagasphoṭaraveṇa) - by the sound of exploding mountains

• च (ca) - and

• ऐरावणनिनादेन (airāvaṇaninādena) - by the trumpet/sound of Airāvata

• सम्यक् (samyak) - perfectly, correctly, completely

• ध्यानी (dhyānī) - a perfectly meditating person (a meditating person, one who practices meditation (dhyāna))

• न (na) - not

• कम्पते (kampate) - trembles, shakes

Words meanings and morphology

अशनिस्वनघोषेण (aśanisvanaghoṣeṇa) - by the sound of thunderbolts

(noun)

Instrumental, masculine, singular of aśanisvanaghoṣa

aśanisvanaghoṣa - sound of thunder, roar of a thunderbolt

Compound type : tatpuruṣa (aśani+svana+ghoṣa)

• aśani – thunderbolt, lightning
  noun (masculine)
• svana – sound, noise
  noun (masculine)
• ghoṣa – sound, roar
  noun (masculine)

नगस्फोटरवेण (nagasphoṭaraveṇa) - by the sound of exploding mountains

(noun)

Instrumental, masculine, singular of nagasphoṭarava

nagasphoṭarava - sound of a mountain splitting/exploding

Compound type : tatpuruṣa (naga+sphoṭa+rava)

• naga – mountain, tree
  noun (masculine)
• sphoṭa – bursting, splitting, explosion
  noun (masculine)
• rava – sound, roar
  noun (masculine)

च (ca) - and

(indeclinable)

ऐरावणनिनादेन (airāvaṇaninādena) - by the trumpet/sound of Airāvata

(noun)

Instrumental, masculine, singular of airāvaṇanināda

airāvaṇanināda - sound/trumpet of Airāvata (Indra's elephant)

Compound type : tatpuruṣa (airāvaṇa+nināda)

• airāvaṇa – Airāvata, the elephant of Indra
  proper noun (masculine)
• nināda – sound, roar, trumpet
  noun (masculine)

सम्यक् (samyak) - perfectly, correctly, completely

(indeclinable)

ध्यानी (dhyānī) - a perfectly meditating person (a meditating person, one who practices meditation (dhyāna))

(noun)

Nominative, masculine, singular of dhyānin

dhyānin - meditating, contemplative; a meditator, one who practices dhyāna (meditation)

derived from dhyāna

न (na) - not

(indeclinable)

कम्पते (kampate) - trembles, shakes

(verb)

3rd person , singular, middle, present (laṭ) of kamp

Root: kamp (class 1)