महाभारतः mahābhārataḥ - book-7, chapter-101, verse-48

ततो निष्टानको घोरः पाण्डवानामजायत ।
द्रोणेन वध्यमानेषु सैन्येषु भरतर्षभ ॥४८॥

48. tato niṣṭānako ghoraḥ pāṇḍavānāmajāyata ,
droṇena vadhyamāneṣu sainyeṣu bharatarṣabha.

48. tataḥ niṣṭānakaḥ ghoraḥ pāṇḍavānām ajāyata
droṇena vadhyamāneṣu sainyeṣu bharatarṣabha

48. bharatarṣabha droṇena sainyeṣu vadhyamāneṣu
tataḥ pāṇḍavānām ghoraḥ niṣṭānakaḥ ajāyata

48. Then a dreadful roar arose from the Pāṇḍavas, O best of the Bhāratas, as their armies were being slaughtered by Droṇa.

Words meanings summery:

• ततः (tataḥ) - then, thereupon, therefrom

• निष्टानकः (niṣṭānakaḥ) - a roar, a loud noise, a clamor

• घोरः (ghoraḥ) - dreadful, terrible, fearful

• पाण्डवानाम् (pāṇḍavānām) - of the Pandavas

• अजायत (ajāyata) - arose, was born, came to be

• द्रोणेन (droṇena) - by Drona

• वध्यमानेषु (vadhyamāneṣu) - while being slain, being slaughtered

• सैन्येषु (sainyeṣu) - among the armies, in the forces

• भरतर्षभ (bharatarṣabha) - O Dhṛtarāṣṭra (O best of Bharatas)

Words meanings and morphology

ततः (tataḥ) - then, thereupon, therefrom

(indeclinable)

निष्टानकः (niṣṭānakaḥ) - a roar, a loud noise, a clamor

(noun)

Nominative, masculine, singular of niṣṭānaka

niṣṭānaka - a loud sound, a roar, a noise

घोरः (ghoraḥ) - dreadful, terrible, fearful

(adjective)

Nominative, masculine, singular of ghora

ghora - dreadful, terrible, fierce, awful

पाण्डवानाम् (pāṇḍavānām) - of the Pandavas

(proper noun)

Genitive, masculine, plural of pāṇḍava

pāṇḍava - descendant of Pandu, the Pandavas

अजायत (ajāyata) - arose, was born, came to be

(verb)

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

Imperfect 3rd person singular Middle voice of root jan, class 4.

Prefix: a

Root: jan (class 4)

द्रोणेन (droṇena) - by Drona

(proper noun)

Instrumental, masculine, singular of droṇa

droṇa - Drona (a famous preceptor in the Mahabharata)

वध्यमानेषु (vadhyamāneṣu) - while being slain, being slaughtered

(participle)

Locative, masculine, plural of vadhyamāna

vadhyamāna - being killed, being smitten

Present Passive Participle

Derived from the root han (to strike, kill) in the passive voice with the suffix -yamāna.

Root: han (class 2)

सैन्येषु (sainyeṣu) - among the armies, in the forces

(noun)

Locative, neuter, plural of sainya

sainya - army, host, military force; relating to an army

भरतर्षभ (bharatarṣabha) - O Dhṛtarāṣṭra (O best of Bharatas)

(noun)

Vocative, masculine, singular of bharatarṣabha

bharatarṣabha - bull (i.e., best) among the Bharatas; epithet for prominent warriors or kings

Compound type : tatpuruṣa (bharata+ṛṣabha)

• bharata – descendant of Bharata (an ancient king), a member of the Bharata lineage
  proper noun (masculine)
• ṛṣabha – bull; chief, best, excellent among
  noun (masculine)