महाभारतः mahābhārataḥ - book-3, chapter-149, verse-43

मन्त्रमूला नयाः सर्वे चाराश्च भरतर्षभ ।
सुमन्त्रितैर्नयैः सिद्धिस्तद्विदैः सह मन्त्रयेत् ॥४३॥

43. mantramūlā nayāḥ sarve cārāśca bharatarṣabha ,
sumantritairnayaiḥ siddhistadvidaiḥ saha mantrayet.

43. mantramūlāḥ nayāḥ sarve cārāḥ ca bharatarṣabha
sumantritaiḥ nayaiḥ siddhiḥ tadvidaiḥ saha mantrayet

43. O best of Bharatas, all policies and also spies have their foundation in deliberation (mantra). Success is achieved through well-deliberated policies (naya), therefore, one should consult with those who are experts in this field.

Words meanings summery:

• मन्त्रमूलाः (mantramūlāḥ) - having counsel as their root, based on deliberation

• नयाः (nayāḥ) - policies, strategies, courses of action

• सर्वे (sarve) - all, every

• चाराः (cārāḥ) - spies, emissaries

• च (ca) - and, also

• भरतर्षभ (bharatarṣabha) - O best of Bharatas

• सुमन्त्रितैः (sumantritaiḥ) - by well-counseled, by well-deliberated

• नयैः (nayaiḥ) - by policies, by strategies

• सिद्धिः (siddhiḥ) - success, accomplishment, fulfillment

• तद्विदैः (tadvidaiḥ) - with those who know that, with experts

• सह (saha) - with, along with

• मन्त्रयेत् (mantrayet) - one should consult, one should deliberate

Words meanings and morphology

मन्त्रमूलाः (mantramūlāḥ) - having counsel as their root, based on deliberation

(adjective)

Nominative, masculine, plural of mantramūla

mantramūla - whose root or basis is counsel/deliberation

Compound type : bahuvrīhi (mantra+mūla)

• mantra – counsel, deliberation, sacred utterance
  noun (masculine)
  Root: mantr
• mūla – root, basis, foundation, origin
  noun (neuter)

नयाः (nayāḥ) - policies, strategies, courses of action

(noun)

Nominative, masculine, plural of naya

naya - policy, conduct, strategy, prudence

Root: nī

सर्वे (sarve) - all, every

(pronoun)

Nominative, masculine, plural of sarva

sarva - all, every, whole, complete

चाराः (cārāḥ) - spies, emissaries

(noun)

Nominative, masculine, plural of cāra

cāra - spy, secret emissary, movement, wandering

Root: car

च (ca) - and, also

(indeclinable)

भरतर्षभ (bharatarṣabha) - O best of Bharatas

(proper noun)

Vocative, masculine, singular of bharatarṣabha

bharatarṣabha - bull of the Bharatas, best among the Bharatas (an epithet, often for Arjuna or Dhṛtarāṣṭra)

Compound type : tatpuruṣa (bharata+ṛṣabha)

• bharata – name of a legendary king, a descendant of Bharata
  proper noun (masculine)
• ṛṣabha – bull, best, excellent, chief
  noun (masculine)

सुमन्त्रितैः (sumantritaiḥ) - by well-counseled, by well-deliberated

(adjective)

Instrumental, masculine, plural of sumantrita

sumantrita - well-counseled, well-deliberated, well-advised

Past Passive Participle

prefix su- + root mantr + kta suffix

Prefix: su

Root: mantr (class 10)

नयैः (nayaiḥ) - by policies, by strategies

(noun)

Instrumental, masculine, plural of naya

naya - policy, conduct, strategy, prudence

Root: nī

सिद्धिः (siddhiḥ) - success, accomplishment, fulfillment

(noun)

Nominative, feminine, singular of siddhi

siddhi - success, accomplishment, fulfillment, perfection, supernatural power

Root: sidh

तद्विदैः (tadvidaiḥ) - with those who know that, with experts

(adjective)

Instrumental, masculine, plural of tadvid

tadvid - knowing that, expert in that

Compound type : tatpuruṣa (tad+vid)

• tad – that
  pronoun (neuter)
• vid – knowing, expert
  adjective (masculine)
  derived from root vid (to know)
  Root: vid

सह (saha) - with, along with

(indeclinable)

मन्त्रयेत् (mantrayet) - one should consult, one should deliberate

(verb)

3rd person , singular, active, optative (vidhiliṅ) of mantr

denominal from mantra (noun)

Root: mantr (class 10)