महाभारतः mahābhārataḥ - book-13, chapter-136, verse-8

पन्थानः सर्वनेतारो यज्ञवाहाः सनातनाः ।
पितृपैतामहीं गुर्वीमुद्वहन्ति धुरं सदा ॥८॥

8. panthānaḥ sarvanetāro yajñavāhāḥ sanātanāḥ ,
pitṛpaitāmahīṁ gurvīmudvahanti dhuraṁ sadā.

8. panthānaḥ sarvanetāraḥ yajñavāhāḥ sanātanāḥ
pitṛpaitāmahīm gurvīm udvahanti dhuram sadā

8. They are the eternal paths and universal guides, the upholders of Vedic rituals (yajña). They always bear the weighty, ancestral responsibility.

Words meanings summery:

• पन्थानः (panthānaḥ) - upholders of the path (of natural law) (paths, roads, ways, travelers, guides)

• सर्वनेतारः (sarvanetāraḥ) - leaders of all, universal guides

• यज्ञवाहाः (yajñavāhāḥ) - performers of Vedic rituals (yajña), upholders of (yajña)

• सनातनाः (sanātanāḥ) - eternal, ancient, everlasting

• पितृपैतामहीम् (pitṛpaitāmahīm) - ancestral, pertaining to fathers and grandfathers

• गुर्वीम् (gurvīm) - weighty (heavy, great, important, venerable)

• उद्वहन्ति (udvahanti) - they carry, they bear, they uphold

• धुरम् (dhuram) - burden, yoke, responsibility, charge

• सदा (sadā) - always, ever, constantly

Words meanings and morphology

पन्थानः (panthānaḥ) - upholders of the path (of natural law) (paths, roads, ways, travelers, guides)

(noun)

Nominative, masculine, plural of pathin

pathin - a path, a road, a way

Root: path

सर्वनेतारः (sarvanetāraḥ) - leaders of all, universal guides

(noun)

Nominative, masculine, plural of sarvanetṛ

sarvanetṛ - leader of all, universal guide

Compound type : tatpuruṣa (sarva+netṛ)

• sarva – all, every, whole
  pronoun
• netṛ – a leader, a guide, a bringer
  noun (masculine)
  from √nī (to lead)
  Root: nī (class 1)

यज्ञवाहाः (yajñavāhāḥ) - performers of Vedic rituals (yajña), upholders of (yajña)

(noun)

Nominative, masculine, plural of yajñavāha

yajñavāha - one who carries on a (yajña), a performer of (yajña)

Compound type : tatpuruṣa (yajña+vāha)

• yajña – Vedic ritual, sacred rite, devotion
  noun (masculine)
  from √yaj (to worship, sacrifice)
  Root: yaj (class 1)
• vāha – carrier, bearer, leading
  noun (masculine)
  from √vah (to carry, bear)
  Root: vah (class 1)

Note: Translating (yajña) as Vedic ritual.

सनातनाः (sanātanāḥ) - eternal, ancient, everlasting

(adjective)

Nominative, masculine, plural of sanātana

sanātana - eternal, perpetual, ancient

from sadā (always) + tana (suffix indicating belonging to time)

Note: Agrees with `panthānaḥ` and `yajñavāhāḥ`.

पितृपैतामहीम् (pitṛpaitāmahīm) - ancestral, pertaining to fathers and grandfathers

(adjective)

Accusative, feminine, singular of pitṛpaitāmahī

pitṛpaitāmahī - paternal and ancestral, ancestral, inherited

derived from pitṛ (father) and pitāmaha (grandfather)

Compound type : tatpuruṣa (pitṛ+pitāmaha)

• pitṛ – father, paternal
  noun (masculine)
• pitāmaha – paternal grandfather, ancestral
  noun (masculine)

Note: Agrees with `dhuram`.

गुर्वीम् (gurvīm) - weighty (heavy, great, important, venerable)

(adjective)

Accusative, feminine, singular of gurvī

gurvī - heavy, important, weighty, venerable (feminine form of guru)

Feminine form of guru (heavy, important)

Note: Agrees with `dhuram`.

उद्वहन्ति (udvahanti) - they carry, they bear, they uphold

(verb)

3rd person , plural, active, present (laṭ) of udvah

present

from ud-√vah (to carry, bear)

Prefix: ud

Root: vah (class 1)

Note: The subject is implied, referring to the "paths, leaders, upholders of yajña" (from previous nominative plurals).

धुरम् (dhuram) - burden, yoke, responsibility, charge

(noun)

Accusative, feminine, singular of dhur

dhur - a burden, a yoke, a responsibility

Root: dhur (class 1)

सदा (sadā) - always, ever, constantly

(indeclinable)