महाभारतः mahābhārataḥ - book-9, chapter-40, verse-13

तस्मिंस्तु विधिवत्सत्रे संप्रवृत्ते सुदारुणे ।
अक्षीयत ततो राष्ट्रं धृतराष्ट्रस्य पार्थिव ॥१३॥

13. tasmiṁstu vidhivatsatre saṁpravṛtte sudāruṇe ,
akṣīyata tato rāṣṭraṁ dhṛtarāṣṭrasya pārthiva.

13. tasmin tu vidhivat satre sampravṛtte sudāruṇe
akṣīyata tataḥ rāṣṭram dhṛtarāṣṭrasya pārthiva

13. pārthiva tu tasmin vidhivat sudāruṇe satre
sampravṛtte tataḥ dhṛtarāṣṭrasya rāṣṭram akṣīyata

13. Indeed, when that extremely dreadful Vedic ritual (yajña) commenced, performed according to the prescribed rituals, then the kingdom of Dhṛtarāṣṭra began to dwindle, O king.

Words meanings summery:

• तस्मिन् (tasmin) - in that specific sacrifice (in that, on that)

• तु (tu) - but, indeed, however

• विधिवत् (vidhivat) - according to rule, properly, ritually

• सत्रे (satre) - in the specific sacrificial session (in the sacrifice, in the session)

• सम्प्रवृत्ते (sampravṛtte) - when it (the sacrifice) had begun (having begun, being fully engaged, started)

• सुदारुणे (sudāruṇe) - referring to the sacrifice being extremely dreadful (very dreadful, extremely terrible)

• अक्षीयत (akṣīyata) - was diminished, wasted away, dwindled

• ततः (tataḥ) - then, from that, therefore

• राष्ट्रम् (rāṣṭram) - kingdom, realm, nation, country

• धृतराष्ट्रस्य (dhṛtarāṣṭrasya) - of Dhṛtarāṣṭra

• पार्थिव (pārthiva) - O king (vocative, addressing an unnamed king, likely Janamejaya) (O king, earthly, relating to the earth)

Words meanings and morphology

तस्मिन् (tasmin) - in that specific sacrifice (in that, on that)

(pronoun)

Locative, neuter, singular of tad

tad - that, he, she, it

तु (tu) - but, indeed, however

(indeclinable)

विधिवत् (vidhivat) - according to rule, properly, ritually

(indeclinable)

Derived from vidhi (rule) with the suffix -vat (like, according to).

सत्रे (satre) - in the specific sacrificial session (in the sacrifice, in the session)

(noun)

Locative, neuter, singular of satra

satra - sacrifice, sacrificial session, lasting offering

सम्प्रवृत्ते (sampravṛtte) - when it (the sacrifice) had begun (having begun, being fully engaged, started)

(participle)

Locative, neuter, singular of sampravṛtta

sampravṛtta - commenced, started, fully engaged, turned, happened

Past Passive Participle

Derived from root 'vṛt' (to turn, exist) with prefixes 'sam' and 'pra'.

Prefixes: sam+pra

Root: vṛt (class 1)

सुदारुणे (sudāruṇe) - referring to the sacrifice being extremely dreadful (very dreadful, extremely terrible)

(adjective)

Locative, neuter, singular of sudāruṇa

sudāruṇa - very dreadful, extremely terrible, formidable

Compound type : Karmadhāraya (su+dāruṇa)

• su – good, well, very, excellent
  indeclinable
• dāruṇa – dreadful, terrible, cruel, hard
  adjective (masculine)

अक्षीयत (akṣīyata) - was diminished, wasted away, dwindled

(verb)

3rd person , singular, passive, past imperfect (laṅ) of kṣī

Root: kṣi (class 5)

ततः (tataḥ) - then, from that, therefore

(indeclinable)

राष्ट्रम् (rāṣṭram) - kingdom, realm, nation, country

(noun)

Nominative, neuter, singular of rāṣṭra

rāṣṭra - kingdom, realm, nation, country

धृतराष्ट्रस्य (dhṛtarāṣṭrasya) - of Dhṛtarāṣṭra

(proper noun)

Genitive, masculine, singular of dhṛtarāṣṭra

dhṛtarāṣṭra - Dhṛtarāṣṭra (proper noun, name of the blind king in Mahabharata)

पार्थिव (pārthiva) - O king (vocative, addressing an unnamed king, likely Janamejaya) (O king, earthly, relating to the earth)

(noun)

Vocative, masculine, singular of pārthiva

pārthiva - king, ruler, earthly, terrestrial

Derived from 'pṛthivī' (earth).