महाभारतः mahābhārataḥ - book-3, chapter-13, verse-13

अपकृष्टोत्तरासङ्गः कृशो धमनिसंततः ।
आसीः कृष्ण सरस्वत्यां सत्रे द्वादशवार्षिके ॥१३॥

13. apakṛṣṭottarāsaṅgaḥ kṛśo dhamanisaṁtataḥ ,
āsīḥ kṛṣṇa sarasvatyāṁ satre dvādaśavārṣike.

13. apakṛṣṭottarāsaṅgaḥ kṛśaḥ dhamanisaṃtataḥ
āsīḥ kṛṣṇa sarasvatyāṃ satre dvādaśavārṣike

13. O Krishna, you performed a twelve-year ritual sacrifice (sattra) on the Sarasvatī, (during which you were) emaciated, with your upper garment pulled back, and your body covered with prominent veins.

Words meanings summery:

• अपकृष्टोत्तरासङ्गः (apakṛṣṭottarāsaṅgaḥ) - with the upper garment pulled back/removed

• कृशः (kṛśaḥ) - emaciated, lean, thin

• धमनिसंततः (dhamanisaṁtataḥ) - visible veins due to extreme emaciation (covered with veins, spread with veins, having prominent veins)

• आसीः (āsīḥ) - you were

• कृष्ण (kṛṣṇa) - O Krishna

• सरस्वत्यां (sarasvatyāṁ) - on the Sarasvatī (river)

• सत्रे (satre) - during a specific long-term Vedic ritual sacrifice (in a ritual sacrifice (sattra))

• द्वादशवार्षिके (dvādaśavārṣike) - lasting twelve years, twelve-yearly

Words meanings and morphology

अपकृष्टोत्तरासङ्गः (apakṛṣṭottarāsaṅgaḥ) - with the upper garment pulled back/removed

(adjective)

Nominative, masculine, singular of apakṛṣṭottarāsaṅga

apakṛṣṭottarāsaṅga - having the upper garment drawn back or removed

Compound type : bahuvrīhi (apakṛṣṭa+uttarāsaṅga)

• apakṛṣṭa – pulled back, drawn away, removed
  participle
  Past Passive Participle
  Derived from root kṛṣ with prefix apa-
  Prefix: apa
  Root: kṛṣ (class 1)
• uttarāsaṅga – upper garment, mantle
  noun (masculine)

कृशः (kṛśaḥ) - emaciated, lean, thin

(adjective)

Nominative, masculine, singular of kṛśa

kṛśa - emaciated, thin, lean, slender

धमनिसंततः (dhamanisaṁtataḥ) - visible veins due to extreme emaciation (covered with veins, spread with veins, having prominent veins)

(adjective)

Nominative, masculine, singular of dhamanisaṃtata

dhamanisaṁtata - covered with veins, having veins spread out

Compound type : tatpuruṣa (dhamani+saṃtata)

• dhamani – vein, artery, nerve
  noun (feminine)
• saṃtata – spread, extended, covered, diffused
  participle
  Past Passive Participle
  Derived from root tan with prefix sam-
  Prefix: sam
  Root: tan (class 8)

आसीः (āsīḥ) - you were

(verb)

2nd person , singular, active, imperfect past (laṅ) of as

Root: as (class 2)

कृष्ण (kṛṣṇa) - O Krishna

(proper noun)

Vocative, masculine, singular of kṛṣṇa

kṛṣṇa - Krishna (a divine name); dark, black

सरस्वत्यां (sarasvatyāṁ) - on the Sarasvatī (river)

(proper noun)

Locative, feminine, singular of sarasvatī

sarasvatī - Sarasvatī (name of a sacred river and goddess of knowledge)

सत्रे (satre) - during a specific long-term Vedic ritual sacrifice (in a ritual sacrifice (sattra))

(noun)

Locative, neuter, singular of sattra

sattra - a long sacrificial session, a ritual sacrifice, an asylum

द्वादशवार्षिके (dvādaśavārṣike) - lasting twelve years, twelve-yearly

(adjective)

Locative, neuter, singular of dvādaśavārṣika

dvādaśavārṣika - lasting twelve years, twelve-yearly

Compound type : tatpuruṣa (dvādaśa+vārṣika)

• dvādaśa – twelve
  numeral
• vārṣika – yearly, annual, pertaining to a year
  adjective
  Derived from varṣa ('year') with -ika suffix