योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-50, verse-41

हृदि स्फोटशिलापट्टदृढे पीवरमूर्धनि ।
भित्त्वा वज्रसमैर्बाणैः पातयत्येव भूतले ॥ ४१ ॥

hṛdi sphoṭaśilāpaṭṭadṛḍhe pīvaramūrdhani ,
bhittvā vajrasamairbāṇaiḥ pātayatyeva bhūtale 41

41. hṛdi sphoṭaśilāpaṭṭadṛḍhe pīvaramūrdhani
bhittvā vajrasamaiḥ bāṇaiḥ pātayati eva bhūtale

41. (saḥ) vajrasamaiḥ bāṇaiḥ sphoṭaśilāpaṭṭadṛḍhe
pīvaramūrdhani hṛdi ca bhittvā (tam) bhūtale eva pātayati

41. Having pierced (Vidūratha's) strong head, which was firm like a slab of blasting rock, and (his) heart, with his thunderbolt-like arrows, he then caused him to fall onto the ground.

Words meanings summery:

• हृदि (hṛdi) - in the heart (in the heart, in the mind)

• स्फोटशिलापट्टदृढे (sphoṭaśilāpaṭṭadṛḍhe) - firm like a slab of rock that bursts (when struck) (firm like a slab of blasting rock)

• पीवरमूर्धनि (pīvaramūrdhani) - on (Vidūratha's) strong, massive head (on the massive head, on the strong head)

• भित्त्वा (bhittvā) - having pierced (having pierced, having split, having broken)

• वज्रसमैः (vajrasamaiḥ) - with thunderbolt-like (arrows), powerful as thunderbolts (with thunderbolt-like, resembling a thunderbolt)

• बाणैः (bāṇaiḥ) - with arrows

• पातयति (pātayati) - he causes (him) to fall (he causes to fall, he throws down, he fells)

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

• भूतले (bhūtale) - onto the ground (on the ground, on the earth's surface)

Words meanings and morphology

हृदि (hṛdi) - in the heart (in the heart, in the mind)

(noun)

Locative, neuter, singular of hṛd

hṛd - heart, mind, breast, essence

Note: Location of piercing

स्फोटशिलापट्टदृढे (sphoṭaśilāpaṭṭadṛḍhe) - firm like a slab of rock that bursts (when struck) (firm like a slab of blasting rock)

(adjective)

Locative, masculine, singular of sphoṭaśilāpaṭṭadṛḍha

sphoṭaśilāpaṭṭadṛḍha - firm as a slab of blasting rock

Compound noun, Bahuvrihi (dṛḍha like a śilāpaṭṭa used for sphoṭa). `sphoṭa` (bursting) `śilāpaṭṭa` (rock slab) `dṛḍha` (firm). Comparison `ivārthe` implies similarity.

Compound type : bahuvrihi (sphoṭa+śilāpaṭṭa+dṛḍha)

• sphoṭa – bursting, explosion, sound, meaning
  noun (masculine)
  From root `sphuṭ` (to burst)
  Root: sphuṭ (class 6)
• śilāpaṭṭa – rock slab, stone tablet
  noun (masculine)
  Compound: śilā (rock) + paṭṭa (slab)
• dṛḍha – firm, hard, strong, solid
  adjective (masculine)
  Past Passive Participle
  From root `dṛh` (to make firm) + `kta` suffix
  Root: dṛh (class 1)

Note: Qualifies `mūrdhani`

पीवरमूर्धनि (pīvaramūrdhani) - on (Vidūratha's) strong, massive head (on the massive head, on the strong head)

(noun)

Locative, masculine, singular of pīvaramūrdhan

pīvaramūrdhan - having a fat/massive/strong head

Compound noun (pīvara + mūrdhan). Can be considered a karmadhāraya (a strong head).

Compound type : karmadhāraya (pīvara+mūrdhan)

• pīvara – fat, plump, strong, massive
  adjective (masculine)
  Root: pī (class 4)
• mūrdhan – head, top, summit
  noun (masculine)

Note: Location of piercing

भित्त्वा (bhittvā) - having pierced (having pierced, having split, having broken)

(indeclinable)

Absolutive (gerund)

From root `bhid` (7th class, `bhinatti`) + suffix `-tvā`

Root: bhid (class 7)

वज्रसमैः (vajrasamaiḥ) - with thunderbolt-like (arrows), powerful as thunderbolts (with thunderbolt-like, resembling a thunderbolt)

(adjective)

Instrumental, masculine, plural of vajrasama

vajrasama - thunderbolt-like, equal to a thunderbolt

Compound noun (vajra + sama). Tatpurusha or Karmadhāraya. Comparison via `sama`.

Compound type : tatpurusha (vajra+sama)

• vajra – thunderbolt, diamond
  noun (neuter)
  Root: vaj (class 1)
• sama – equal, similar, like, same
  adjective (masculine)

Note: Qualifies `bāṇaiḥ`

बाणैः (bāṇaiḥ) - with arrows

(noun)

Instrumental, masculine, plural of bāṇa

bāṇa - arrow, reed, name of an asura

From root `van` (to wound) or `bā` (to go, move)

Root: van / bā

Note: Means of piercing

पातयति (pātayati) - he causes (him) to fall (he causes to fall, he throws down, he fells)

(verb)

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

Present active indicative (laṭ)

From causative stem of root `pat` (to fall, fly)

Root: pat (class 1)

Note: Main verb of the sentence

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

(indeclinable)

Note: Adds emphasis to the action

भूतले (bhūtale) - onto the ground (on the ground, on the earth's surface)

(noun)

Locative, neuter, singular of bhūtala

bhūtala - surface of the earth, ground

Compound noun (bhū + tala)

Compound type : tatpurusha (bhū+tala)

• bhū – earth, ground, land
  noun (feminine)
• tala – surface, plain, base, palm of hand/sole of foot
  noun (neuter)