महाभारतः mahābhārataḥ - book-12, chapter-79, verse-20

भीष्म उवाच ।
तपसा ब्रह्मचर्येण शस्त्रेण च बलेन च ।
अमायया मायया च नियन्तव्यं तदा भवेत् ॥२०॥

20. bhīṣma uvāca ,
tapasā brahmacaryeṇa śastreṇa ca balena ca ,
amāyayā māyayā ca niyantavyaṁ tadā bhavet.

20. भीष्मः उवाच तपसा ब्रह्मचर्येण शस्त्रेण च
बलेन च अमायया मायया च नियन्तव्यम् तदा भवेत्

20. तदा तपसा ब्रह्मचर्येण शस्त्रेण च बलेन
च अमायया च मायया च नियन्तव्यम् भवेत्

20. Bhishma said: Then, it should be controlled by means of austerity (tapas), celibacy, weapons, strength, as well as by honesty (amāyā) and by deceit (māyā).

Words meanings summery:

• भीष्मः (भीष्मः) - The elder Bhishma (Bhishma)

• उवाच (उवाच) - said, spoke

• तपसा (तपसा) - by austerity

• ब्रह्मचर्येण (ब्रह्मचर्येण) - by celibacy, by religious studenthood

• शस्त्रेण (शस्त्रेण) - by weapon, by instrument

• च (च) - and

• बलेन (बलेन) - by strength, by power

• च (च) - and

• अमायया (अमायया) - by honesty, without deceit

• मायया (मायया) - by deceit, by illusion

• च (च) - and

• नियन्तव्यम् (नियन्तव्यम्) - should be controlled, to be restrained

• तदा (तदा) - then, at that time

• भवेत् (भवेत्) - it should be, it would be

Words meanings and morphology

भीष्मः (भीष्मः) - The elder Bhishma (Bhishma)

(proper noun)

Nominative, masculine, singular of भीष्म

भीष्म - Bhishma (name of a character in the Mahabharata)

उवाच (उवाच) - said, spoke

(verb)

3rd person , singular, active, perfect (lit) of वच्

Root: वच् (class 2)

तपसा (तपसा) - by austerity

(noun)

Instrumental, neuter, singular of तपस्

तपस् - heat, religious austerity, penance

ब्रह्मचर्येण (ब्रह्मचर्येण) - by celibacy, by religious studenthood

(noun)

Instrumental, neuter, singular of ब्रह्मचर्य

ब्रह्मचर्य - celibacy, chaste living, the state of a religious student

Derived from brahman (Brahman, Veda) and carya (conduct, practice).

Compound type : tatpurusha (ब्रह्मन्+चर्य)

• ब्रह्मन् – Brahman, sacred knowledge, the Vedas
  noun (neuter)
• चर्य – conduct, practice, course
  noun (masculine)
  Derived from root car (to move, to practice).
  Root: चर् (class 1)

शस्त्रेण (शस्त्रेण) - by weapon, by instrument

(noun)

Instrumental, neuter, singular of शस्त्र

शस्त्र - weapon, tool, instrument

च (च) - and

(indeclinable)

बलेन (बलेन) - by strength, by power

(noun)

Instrumental, neuter, singular of बल

बल - strength, power, force

च (च) - and

(indeclinable)

अमायया (अमायया) - by honesty, without deceit

(noun)

Instrumental, feminine, singular of अमाया

अमाया - honesty, sincerity, absence of deceit (māyā)

Compound type : nañ-tatpuruṣa (अ+माया)

• अ – not, non-, un-
  prefix
  Negative prefix
• माया – illusion, deceit, magical power
  noun (feminine)

मायया (मायया) - by deceit, by illusion

(noun)

Instrumental, feminine, singular of माया

माया - illusion, deceit, magical power

च (च) - and

(indeclinable)

नियन्तव्यम् (नियन्तव्यम्) - should be controlled, to be restrained

(adjective)

Nominative, neuter, singular of नियन्तव्य

नियन्तव्य - to be controlled, to be restrained, suitable for control

Gerundive (Future Passive Participle)

Formed from root yam with prefix ni, suffix -tavya.

Prefix: नि

Root: यम् (class 1)

Note: Used here predicatively, implying 'it should be controlled'.

तदा (तदा) - then, at that time

(indeclinable)

भवेत् (भवेत्) - it should be, it would be

(verb)

3rd person , singular, active, optative (vidhi-liṅ) of भू

Root: भू (class 1)