महाभारतः mahābhārataḥ - book-12, chapter-140, verse-8

अद्वैधज्ञः पथि द्वैधे संशयं प्राप्तुमर्हति ।
बुद्धिद्वैधं वेदितव्यं पुरस्तादेव भारत ॥८॥

8. advaidhajñaḥ pathi dvaidhe saṁśayaṁ prāptumarhati ,
buddhidvaidhaṁ veditavyaṁ purastādeva bhārata.

8. advadha-jñaḥ pathi dvaidhe saṃśayam prāptum arhati
| buddhi-dvaidham veditavyam purastāt eva bhārata

8. advadha-jñaḥ dvaidhe pathi saṃśayam prāptum arhati he bhārata,
buddhi-dvaidham purastāt eva veditavyam

8. One who is unfamiliar with duplicity is likely to encounter doubt on a path that is ambiguous. O Bhārata, intellectual uncertainty must be recognized beforehand.

Words meanings summery:

• अद्वध-ज्ञः (advadha-jñaḥ) - one who is unfamiliar with duplicity (one who knows certainty, one unfamiliar with ambiguity/duplicity)

• पथि (pathi) - on a path (on the path, in the way)

• द्वैधे (dvaidhe) - that is divided, ambiguous (in doubt, in ambiguity, divided, double)

• संशयम् (saṁśayam) - doubt (doubt, uncertainty, perplexity)

• प्राप्तुम् (prāptum) - to encounter (to obtain, to reach, to get)

• अर्हति (arhati) - is likely (to) (is able, ought, deserves, is likely)

• बुद्धि-द्वैधम् (buddhi-dvaidham) - intellectual uncertainty (intellectual doubt, mental division)

• वेदितव्यम् (veditavyam) - must be recognized (must be known, to be understood)

• पुरस्तात् (purastāt) - beforehand (before, formerly, in front)

• एव (eva) - even (from the beginning) (indeed, only, just)

• भारत (bhārata) - O Bhārata, descendant of Bharata

Words meanings and morphology

अद्वध-ज्ञः (advadha-jñaḥ) - one who is unfamiliar with duplicity (one who knows certainty, one unfamiliar with ambiguity/duplicity)

(noun)

Nominative, masculine, singular of advadha-jña

advadha-jña - one who knows certainty/non-duplicity, one unfamiliar with doubt

a (not) + dvaidha (duality, uncertainty) + jña (knower)

Compound type : tatpuruṣa (a+dvaidha+jña)

• a – not, un-
  prefix
  Negative prefix
• dvaidha – duality, doubt, uncertainty, ambiguity, duplicity
  noun (neuter)
  From dvi (two)
• jña – knowing, knower
  adjective (masculine)
  From root jñā (to know)
  Root: jñā (class 9)

Note: Subject of arhati.

पथि (pathi) - on a path (on the path, in the way)

(noun)

Locative, masculine, singular of pathin

pathin - path, road, way

Root: path

द्वैधे (dvaidhe) - that is divided, ambiguous (in doubt, in ambiguity, divided, double)

(adjective)

Locative, masculine, singular of dvaidha

dvaidha - divided, dual, ambiguous, doubtful, pertaining to two

From dvi (two)

Note: Qualifies pathi.

संशयम् (saṁśayam) - doubt (doubt, uncertainty, perplexity)

(noun)

Accusative, masculine, singular of saṃśaya

saṁśaya - doubt, uncertainty, suspicion, perplexity

From sam-śī (to doubt)

Prefix: sam

Root: śī (class 7)

Note: Object of prāptum.

प्राप्तुम् (prāptum) - to encounter (to obtain, to reach, to get)

(infinitive)

Note: Used with arhati.

अर्हति (arhati) - is likely (to) (is able, ought, deserves, is likely)

(verb)

3rd person , singular, active, present (laṭ) of arh

present indicative

Root: arh (class 1)

बुद्धि-द्वैधम् (buddhi-dvaidham) - intellectual uncertainty (intellectual doubt, mental division)

(noun)

Nominative, neuter, singular of buddhi-dvaidha

buddhi-dvaidha - intellectual doubt, mental division, ambiguity of intellect

buddhi (intellect) + dvaidha (doubt, division)

Compound type : tatpuruṣa (buddhi+dvaidha)

• buddhi – intelligence, intellect, understanding
  noun (feminine)
  Root: budh (class 1)
• dvaidha – duality, doubt, uncertainty, ambiguity, duplicity
  noun (neuter)
  From dvi (two)

Note: Subject of passive gerundive veditavyam.

वेदितव्यम् (veditavyam) - must be recognized (must be known, to be understood)

(gerundive)

Note: Predicate adjective for buddhi-dvaidham.

पुरस्तात् (purastāt) - beforehand (before, formerly, in front)

(indeclinable)

adverbial from puras

एव (eva) - even (from the beginning) (indeed, only, just)

(indeclinable)

emphatic particle

भारत (bhārata) - O Bhārata, descendant of Bharata

(proper noun)

Vocative, masculine, singular of bhārata

bhārata - descendant of Bharata, related to Bharata, O Bhārata (vocative)

patronymic from Bharata