महाभारतः mahābhārataḥ - book-17, chapter-1, verse-31

श्वा चैवानुययावेकः पाण्डवान्प्रस्थितान्वने ।
क्रमेण ते ययुर्वीरा लौहित्यं सलिलार्णवम् ॥३१॥

31. śvā caivānuyayāvekaḥ pāṇḍavānprasthitānvane ,
krameṇa te yayurvīrā lauhityaṁ salilārṇavam.

31. śvā ca eva anuyayāva ekaḥ pāṇḍavān prasthitān vane
krameṇa te yayuḥ vīrāḥ lauhityaṃ salilārṇavam

31. ekaḥ śvā ca eva vane prasthitān pāṇḍavān anuyayāva
te vīrāḥ krameṇa salilārṇavam lauhityaṃ yayuḥ

31. A single dog indeed followed the Pandavas as they set out into the forest. In due course, those heroes reached the Lohitya, which was like an ocean of water.

Words meanings summery:

• श्वा (śvā) - dog

• च (ca) - and, also

• एव (eva) - indeed, only, just

• अनुययाव (anuyayāva) - followed

• एकः (ekaḥ) - one, a single

• पाण्डवान् (pāṇḍavān) - the sons of Pāṇḍu, the Pāṇḍavas

• प्रस्थितान् (prasthitān) - having departed, set out

• वने (vane) - in the forest

• क्रमेण (krameṇa) - gradually, in due course, in sequence

• ते (te) - they, those

• ययुः (yayuḥ) - went, proceeded

• वीराः (vīrāḥ) - heroes, brave ones

• लौहित्यं (lauhityaṁ) - to the Lohitya (a river/sea, likely Brahmaputra)

• सलिलार्णवम् (salilārṇavam) - ocean of water

Words meanings and morphology

श्वा (śvā) - dog

(noun)

Nominative, masculine, singular of śvan

śvan - dog

च (ca) - and, also

(indeclinable)

एव (eva) - indeed, only, just

(indeclinable)

अनुययाव (anuyayāva) - followed

(verb)

3rd person , singular, active, perfect (liṭ) of anuyā

Prefix: anu

Root: yā (class 2)

एकः (ekaḥ) - one, a single

(adjective)

Nominative, masculine, singular of eka

eka - one, a single

पाण्डवान् (pāṇḍavān) - the sons of Pāṇḍu, the Pāṇḍavas

(proper noun)

Accusative, masculine, plural of pāṇḍava

pāṇḍava - a descendant of Pāṇḍu

प्रस्थितान् (prasthitān) - having departed, set out

(adjective)

Accusative, masculine, plural of prasthita

prasthita - departed, set out, gone forth

Past Passive Participle

From pra- + sthā (to stand) + kta (suffix for PPP)

Prefix: pra

Root: sthā (class 1)

वने (vane) - in the forest

(noun)

Locative, neuter, singular of vana

vana - forest, wood

क्रमेण (krameṇa) - gradually, in due course, in sequence

(noun)

Instrumental, masculine, singular of krama

krama - step, sequence, order

Root: kram (class 1)

ते (te) - they, those

(pronoun)

Nominative, masculine, plural of tad

tad - that, he, she, it

ययुः (yayuḥ) - went, proceeded

(verb)

3rd person , plural, active, perfect (liṭ) of yā

Root: yā (class 2)

वीराः (vīrāḥ) - heroes, brave ones

(noun)

Nominative, masculine, plural of vīra

vīra - hero, brave man

लौहित्यं (lauhityaṁ) - to the Lohitya (a river/sea, likely Brahmaputra)

(proper noun)

Accusative, neuter, singular of lauhitya

lauhitya - name of a river (the Brahmaputra); reddishness

सलिलार्णवम् (salilārṇavam) - ocean of water

(noun)

Accusative, neuter, singular of salilārṇava

salilārṇava - ocean of water

Compound type : tatpurusha (salila+arṇava)

• salila – water
  noun (neuter)
• arṇava – ocean, sea
  noun (masculine)