महाभारतः mahābhārataḥ - book-15, chapter-30, verse-16

ततो युधिष्ठिरो राजा कुरुक्षेत्रमवातरत् ।
क्रमेणोत्तीर्य यमुनां नदीं परमपावनीम् ॥१६॥

16. tato yudhiṣṭhiro rājā kurukṣetramavātarat ,
krameṇottīrya yamunāṁ nadīṁ paramapāvanīm.

16. tataḥ yudhiṣṭhiraḥ rājā kurukṣetram avātarat
krameṇa uttīrya yamunām nadīm paramapāvanīm

16. tataḥ rājā yudhiṣṭhiraḥ paramapāvanīm yamunām
nadīm krameṇa uttīrya kurukṣetram avātarat

16. Then King Yudhishthira proceeded to Kurukshetra, having gradually crossed the supremely purifying Yamuna River.

Words meanings summery:

• ततः (tataḥ) - then (then, thence, afterwards, therefore)

• युधिष्ठिरः (yudhiṣṭhiraḥ) - King Yudhishthira (Yudhishthira)

• राजा (rājā) - the king (king, ruler)

• कुरुक्षेत्रम् (kurukṣetram) - to Kurukshetra (Kurukshetra (name of a battlefield))

• अवातरत् (avātarat) - proceeded (descended, went down, proceeded)

• क्रमेण (krameṇa) - gradually (gradually, in due order, by degrees)

• उत्तीर्य (uttīrya) - having crossed (having crossed, having passed over)

• यमुनाम् (yamunām) - the Yamuna (the Yamuna river)

• नदीम् (nadīm) - river

• परमपावनीम् (paramapāvanīm) - supremely purifying (supremely sacred, very purifying)

Words meanings and morphology

ततः (tataḥ) - then (then, thence, afterwards, therefore)

(indeclinable)

From tad (that) + tasil (ablative suffix).

युधिष्ठिरः (yudhiṣṭhiraḥ) - King Yudhishthira (Yudhishthira)

(proper noun)

Nominative, masculine, singular of yudhiṣṭhira

yudhiṣṭhira - firm in battle, Yudhishthira (proper name of the eldest Pandava)

Literally 'firm in battle' (yudhi-sthira).

राजा (rājā) - the king (king, ruler)

(noun)

Nominative, masculine, singular of rājan

rājan - king, ruler, sovereign

From root √rāj (to rule, shine).

Root: rāj (class 1)

Note: Appositive to Yudhishthira.

कुरुक्षेत्रम् (kurukṣetram) - to Kurukshetra (Kurukshetra (name of a battlefield))

(proper noun)

Accusative, neuter, singular of kurukṣetra

kurukṣetra - the field of the Kurus, Kurukshetra (a holy plain, famous battlefield)

Compound of Kuru (proper name) and Kṣetra (field).

Compound type : tatpuruṣa (kuru+kṣetra)

• kuru – a Kuru (member of an ancient Indian tribe), a proper name
  proper noun (masculine)
• kṣetra – field, land, territory, sacred place
  noun (neuter)

Note: Directional accusative.

अवातरत् (avātarat) - proceeded (descended, went down, proceeded)

(verb)

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

Imperfect tense, third person singular active.

From root √tṛ (to cross, pass over) with prefix ava.

Prefix: ava

Root: tṛ (class 1)

Note: Subject is King Yudhishthira.

क्रमेण (krameṇa) - gradually (gradually, in due order, by degrees)

(noun)

Instrumental, masculine, singular of krama

krama - step, order, series, course

From root √kram (to step, go).

Root: kram (class 1)

Note: Adverbial use of instrumental.

उत्तीर्य (uttīrya) - having crossed (having crossed, having passed over)

(indeclinable)

Absolutive (gerund)

From root √tṛ (to cross) with prefix ud + ya suffix.

Prefix: ud

Root: tṛ (class 1)

Note: Expresses an action completed before the main verb.

यमुनाम् (yamunām) - the Yamuna (the Yamuna river)

(proper noun)

Accusative, feminine, singular of yamunā

yamunā - Yamuna (a sacred river in India)

Note: Object of the absolutive 'uttīrya'.

नदीम् (nadīm) - river

(noun)

Accusative, feminine, singular of nadī

nadī - river, stream

Note: Appositive to 'yamunām'.

परमपावनीम् (paramapāvanīm) - supremely purifying (supremely sacred, very purifying)

(adjective)

Accusative, feminine, singular of paramapāvanī

paramapāvanī - supremely pure, most sanctifying, highly sacred

Compound type : karmadhāraya (parama+pāvanī)

• parama – supreme, highest, utmost, best
  adjective
• pāvanī – purifying, sanctifying, holy (feminine form of pāvana)
  adjective (feminine)
  From root √pū (to purify) + ana suffix + ī (feminine).
  Root: pū (class 1)

Note: Qualifies 'yamunām nadīm'.