महाभारतः mahābhārataḥ - book-6, chapter-111, verse-7

दशमेऽहनि तस्मिंस्तु भीष्मार्जुनसमागमे ।
अवर्तत महारौद्रः सततं समितिक्षयः ॥७॥

7. daśame'hani tasmiṁstu bhīṣmārjunasamāgame ,
avartata mahāraudraḥ satataṁ samitikṣayaḥ.

7. daśame ahani tasmin tu bhīṣmārjunasamāgame
avartata mahāraudraḥ satatam samitikṣayaḥ

7. tu tasmin daśame ahani bhīṣmārjunasamāgame
mahāraudraḥ samitikṣayaḥ satatam avartata

7. On that tenth day, during the confrontation between Bhishma and Arjuna, a terribly fierce destruction (samitikṣaya) in battle constantly took place.

Words meanings summery:

• दशमे (daśame) - on the tenth

• अहनि (ahani) - on the day

• तस्मिन् (tasmin) - in that, on that

• तु (tu) - but, indeed, however

• भीष्मार्जुनसमागमे (bhīṣmārjunasamāgame) - in the encounter/confrontation of Bhishma and Arjuna

• अवर्तत (avartata) - took place, occurred, proceeded

• महारौद्रः (mahāraudraḥ) - very dreadful, terribly fierce

• सततम् (satatam) - constantly, always, continually

• समितिक्षयः (samitikṣayaḥ) - destruction in battle, loss in battle

Words meanings and morphology

दशमे (daśame) - on the tenth

(adjective)

Locative, neuter, singular of daśama

daśama - tenth

Ordinal number from daśan (ten).

अहनि (ahani) - on the day

(noun)

Locative, neuter, singular of ahan

ahan - day

तस्मिन् (tasmin) - in that, on that

(pronoun)

Locative, neuter, singular of tad

tad - that, this

Demonstrative pronoun.

तु (tu) - but, indeed, however

(indeclinable)

Particle.

भीष्मार्जुनसमागमे (bhīṣmārjunasamāgame) - in the encounter/confrontation of Bhishma and Arjuna

(noun)

Locative, masculine, singular of bhīṣmārjunasamāgama

bhīṣmārjunasamāgama - meeting/conjunction of Bhishma and Arjuna

Compound type : tatpurusha (bhīṣma+arjuna+samāgama)

• bhīṣma – Bhishma (proper name)
  proper noun (masculine)
• arjuna – Arjuna (proper name)
  proper noun (masculine)
• samāgama – meeting, encounter, assembly
  noun (masculine)
  From sam-ā- + √gam (to go)
  Prefixes: sam+ā
  Root: gam (class 1)

अवर्तत (avartata) - took place, occurred, proceeded

(verb)

3rd person , singular, middle, past imperfect (laṅ) of vṛt

Imperfect (laṅ)

3rd person singular, middle voice. (a- is augment for imperfect)

Root: vṛt (class 1)

महारौद्रः (mahāraudraḥ) - very dreadful, terribly fierce

(adjective)

Nominative, masculine, singular of mahāraudra

mahāraudra - very terrible, exceedingly fierce

Compound type : karmadharaya (mahā+raudra)

• mahā – great, mighty
  adjective
• raudra – dreadful, terrible, fierce
  adjective

सततम् (satatam) - constantly, always, continually

(indeclinable)

Adverbial form.

Note: Modifies 'avartata'.

समितिक्षयः (samitikṣayaḥ) - destruction in battle, loss in battle

(noun)

Nominative, masculine, singular of samitikṣaya

samitikṣaya - destruction of armies, loss in battle

Compound type : tatpurusha (samiti+kṣaya)

• samiti – assembly, battle, encounter
  noun (feminine)
  From sam- + √i (to go)
  Prefix: sam
  Root: i (class 2)
• kṣaya – destruction, decay, loss
  noun (masculine)