योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-91, verse-20

तृणीकृतत्रिभुवनचपेटास्फोटितद्विषाम् ।
शिरःसु वज्रीकरणं वीर्यं सिंहादिचेतसि ॥ २० ॥

tṛṇīkṛtatribhuvanacapeṭāsphoṭitadviṣām ,
śiraḥsu vajrīkaraṇaṃ vīryaṃ siṃhādicetasi 20

20. tṛṇīkṛtatribhuvanacapeṭāsphoṭitadviṣām
śiraḥsu vajrīkaraṇam vīryam siṃhādicetasi

20. siṃhādicetasi vīryam tṛṇīkṛtatribhuvanacapeṭāsphoṭitadviṣām
śiraḥsu vajrīkaraṇam

20. Valor (vīrya), residing in the hearts of lions and similar beings, manifests as the thunderbolt-like destruction upon the heads of enemies who, with their slaps, had previously trivialized the three worlds.

Words meanings summery:

• तृणीकृतत्रिभुवनचपेटास्फोटितद्विषाम् (tṛṇīkṛtatribhuvanacapeṭāsphoṭitadviṣām) - of enemies whose slaps trivialized the three worlds

• शिरःसु (śiraḥsu) - on the heads

• वज्रीकरणम् (vajrīkaraṇam) - thunderbolt-like destruction (the act of making into a thunderbolt, hardening, crushing with thunderbolt-like force)

• वीर्यम् (vīryam) - valor, strength, power, energy

• सिंहादिचेतसि (siṁhādicetasi) - in the mind/heart of lions and others

Words meanings and morphology

तृणीकृतत्रिभुवनचपेटास्फोटितद्विषाम् (tṛṇīkṛtatribhuvanacapeṭāsphoṭitadviṣām) - of enemies whose slaps trivialized the three worlds

(noun)

Genitive, masculine, plural of tṛṇīkṛtatribhuvanacapeṭāsphoṭitadviṣ

tṛṇīkṛtatribhuvanacapeṭāsphoṭitadviṣ - enemies who, by slaps, made the three worlds like grass (trivialized them)

Bahuvrīhi compound, describing the enemies ('dviṣ'). 'tṛṇīkṛta' (made into grass), 'tribhuvana' (three worlds), 'capeṭā' (slap), 'āsphoṭita' (struck/crushed).

Compound type : bahuvrīhi (tṛṇīkṛta+tribhuvana+capeṭā+āsphoṭita+dviṣ)

• tṛṇīkṛta – made into grass, trivialized
  adjective (neuter)
  Past Passive Participle
  From 'tṛṇa' (grass) + 'īkṛ' (to make into).
  Root: kṛ (class 8)
• tribhuvana – three worlds (heaven, earth, and underworld)
  noun (neuter)
  Dvigu compound: 'tri' (three) + 'bhuvana' (world).
• capeṭā – slap, box on the ear
  noun (feminine)
• āsphoṭita – struck, crushed, burst
  adjective (neuter)
  Past Passive Participle
  From 'ā-sphuṭ' (to burst, strike).
  Prefix: ā
  Root: sphuṭ (class 6)
• dviṣ – enemy, foe, adversary
  noun (masculine)
  From root 'dviṣ' (to hate).
  Root: dviṣ (class 2)

Note: Refers to the enemies whose heads are being described.

शिरःसु (śiraḥsu) - on the heads

(noun)

Locative, neuter, plural of śiras

śiras - head, skull, summit

Note: Denotes the location.

वज्रीकरणम् (vajrīkaraṇam) - thunderbolt-like destruction (the act of making into a thunderbolt, hardening, crushing with thunderbolt-like force)

(noun)

Nominative, neuter, singular of vajrīkaraṇa

vajrīkaraṇa - the act of making into a thunderbolt, hardening, induration, making firm

Verbal Noun

Derived from the verbal root 'kṛ' (to do, make) with 'vajrī' as a prefix or compound component, and suffix '-ana' for action nouns.

Compound type : tatpuruṣa (vajrī+karaṇa)

• vajrī – thunderbolt (as a stem in compounds)
  noun (masculine)
  Derived from 'vajra'.
• karaṇa – act of making, doing, causing
  noun (neuter)
  Verbal Noun
  From root 'kṛ' (to do, make).
  Root: kṛ (class 8)

Note: Subject complement, describing 'vīryam'.

वीर्यम् (vīryam) - valor, strength, power, energy

(noun)

Nominative, neuter, singular of vīrya

vīrya - valor, strength, energy, potency, heroism

Derived from 'vīra' (hero) with the suffix '-ya'.

Note: Subject of the implied sentence.

सिंहादिचेतसि (siṁhādicetasi) - in the mind/heart of lions and others

(noun)

Locative, neuter, singular of siṃhādicetas

siṁhādicetas - the mind/heart of lions and the like

Tatpuruṣa compound of 'siṃhādi' (lions etc.) and 'cetas' (mind, heart). 'siṃhādi' is itself a compound of 'siṃha' (lion) and 'ādi' (etc.).

Compound type : tatpuruṣa (siṃhādi+cetas)

• siṃha – lion
  noun (masculine)
• ādi – beginning, and so on, etc.
  indeclinable
• cetas – mind, heart, intellect, consciousness
  noun (neuter)

Note: Denotes location.