योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-108, verse-12

अकाण्डमभवद्भीममुद्दामदवपावकम् ।
शोषिताशेषगहनं भस्मशेषतृणोलपम् ॥ १२ ॥

akāṇḍamabhavadbhīmamuddāmadavapāvakam ,
śoṣitāśeṣagahanaṃ bhasmaśeṣatṛṇolapam 12

12. akāṇḍam abhavat bhīmam uddāmadavapāvakam
śoṣitāśeṣagahanam bhasmaśeṣatṛṇolapam

12. akāṇḍam bhīmam uddāmadavapāvakam
śoṣitāśeṣagahanam bhasmaśeṣatṛṇolapam abhavat

12. Suddenly, a terrible, unrestrained forest fire arose, which dried up all dense thickets and left only ashes of the grass and reeds.

Words meanings summery:

• अकाण्डम् (akāṇḍam) - untimely, suddenly, without cause

• अभवत् (abhavat) - arose, became, happened

• भीमम् (bhīmam) - terrible, dreadful

• उद्दामदवपावकम् (uddāmadavapāvakam) - a terrible, unrestrained forest fire

• शोषिताशेषगहनम् (śoṣitāśeṣagahanam) - having dried up all dense thickets

• भस्मशेषतृणोलपम् (bhasmaśeṣatṛṇolapam) - with grass and reeds remaining as ashes

Words meanings and morphology

अकाण्डम् (akāṇḍam) - untimely, suddenly, without cause

(indeclinable)

Compound type : tatpurusha (a+kāṇḍa)

• a – not, un-
  indeclinable
• kāṇḍa – stem, section, opportunity, event
  noun (neuter)

Note: Adverbial usage

अभवत् (abhavat) - arose, became, happened

(verb)

3rd person , singular, active, past imperfect (laṅ) of bhū

Imperfect

Root bhū, first conjugation, parasmaipada

Root: bhū (class 1)

Note: Main verb

भीमम् (bhīmam) - terrible, dreadful

(adjective)

Nominative, neuter, singular of bhīma

bhīma - terrible, dreadful, fearful

Root: bhī (class 3)

Note: Predicate nominative, modifying the implied state/event

उद्दामदवपावकम् (uddāmadavapāvakam) - a terrible, unrestrained forest fire

(noun)

Nominative, neuter, singular of uddāmadavapāvaka

uddāmadavapāvaka - unrestrained forest fire (event/state)

Compound type : karmadhāraya (uddāma+davapāvaka)

• uddāma – unrestrained, fierce, strong
  adjective
  Derived from root dam (to tame) with prefix ut-
  Prefix: ut
  Root: dam (class 4)
• davapāvaka – forest fire
  noun (masculine)

Note: Subject or predicate nominative, indicating the nature of what arose.

शोषिताशेषगहनम् (śoṣitāśeṣagahanam) - having dried up all dense thickets

(adjective)

Nominative, neuter, singular of śoṣitāśeṣagahana

śoṣitāśeṣagahana - with all dense thickets dried up

Compound type : bahuvrīhi (śoṣita+aśeṣa+gahana)

• śoṣita – dried up, desiccated
  adjective
  Past Passive Participle
  Derived from root śuṣ (to dry) + kta suffix
  Root: śuṣ (class 4)
• aśeṣa – all, entire, without remainder
  adjective
  Prefix: a
• gahana – dense, deep, impenetrable; dense thicket/forest
  noun (neuter)

Note: Modifies the implied object/state, continuing description from previous adjectives.

भस्मशेषतृणोलपम् (bhasmaśeṣatṛṇolapam) - with grass and reeds remaining as ashes

(adjective)

Nominative, neuter, singular of bhasmaśeṣatṛṇolapa

bhasmaśeṣatṛṇolapa - having grass and reeds reduced to ashes

Compound type : bahuvrīhi (bhasmaśeṣa+tṛṇolapa)

• bhasmaśeṣa – remaining as ashes
  adjective
• tṛṇolapa – grass and reeds (collectively)
  noun (neuter)

Note: Modifies the implied object/state, continuing description from previous adjectives.