महाभारतः mahābhārataḥ - book-3, chapter-172, verse-21

अरक्ष्यमाणान्येतानि त्रैलोक्यस्यापि पाण्डव ।
भवन्ति स्म विनाशाय मैवं भूयः कृथाः क्वचित् ॥२१॥

21. arakṣyamāṇānyetāni trailokyasyāpi pāṇḍava ,
bhavanti sma vināśāya maivaṁ bhūyaḥ kṛthāḥ kvacit.

21. arakṣyamāṇāni etāni trailokyasya api pāṇḍava
bhavanti sma vināśāya mā evam bhūyaḥ kṛthāḥ kvacit

21. O Pāṇḍava, if these (weapons) are not protected, they become the cause of destruction even for the three worlds. Therefore, do not ever act in such a way again.

Words meanings summery:

• अरक्ष्यमाणानि (arakṣyamāṇāni) - not being protected, being unguarded

• एतानि (etāni) - these

• त्रैलोक्यस्य (trailokyasya) - of the three worlds

• अपि (api) - even, also

• पाण्डव (pāṇḍava) - O Pāṇḍava (Arjuna) (O son of Pāṇḍu)

• भवन्ति (bhavanti) - they become, they are

• स्म (sma) - (particle indicating past tense with present verb)

• विनाशाय (vināśāya) - for destruction, to destruction

• मा (mā) - do not

• एवम् (evam) - thus, in this manner, such

• भूयः (bhūyaḥ) - again, further

• कृथाः (kṛthāḥ) - (with 'mā') do not do, do not act (you should do, you should make)

• क्वचित् (kvacit) - (with 'mā') never, nowhere (ever, at any time, anywhere)

Words meanings and morphology

अरक्ष्यमाणानि (arakṣyamāṇāni) - not being protected, being unguarded

(adjective)

neuter, plural of arakṣyamāṇa

arakṣyamāṇa - not being protected, unguarded, neglected

Compound type : nañ-tatpuruṣa (a+rakṣyamāṇa)

• a – not, un- (negative prefix)
  indeclinable
• rakṣyamāṇa – being protected, being guarded (present passive participle)
  adjective (masculine)
  Present Passive Participle
  From root rakṣ (to protect) + śānac suffix, passive voice.
  Root: rakṣ (class 1)

एतानि (etāni) - these

(pronoun)

neuter, plural of etad

etad - this, that

त्रैलोक्यस्य (trailokyasya) - of the three worlds

(noun)

Genitive, neuter, singular of trailokya

trailokya - the three worlds (heaven, earth, and netherworld), the triple world

Derived from triloka (three worlds) with taddhita suffix ṣyañ.

अपि (api) - even, also

(indeclinable)

पाण्डव (pāṇḍava) - O Pāṇḍava (Arjuna) (O son of Pāṇḍu)

(proper noun)

Vocative, masculine, singular of pāṇḍava

pāṇḍava - descendant of Pāṇḍu, one of the Pāṇḍavas

भवन्ति (bhavanti) - they become, they are

(verb)

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

Root: bhū (class 1)

स्म (sma) - (particle indicating past tense with present verb)

(indeclinable)

विनाशाय (vināśāya) - for destruction, to destruction

(noun)

Dative, masculine, singular of vināśa

vināśa - destruction, ruin, loss, disappearance

Derived from root naś (to perish) with prefix vi.

Prefix: vi

Root: naś (class 4)

मा (mā) - do not

(indeclinable)

एवम् (evam) - thus, in this manner, such

(indeclinable)

भूयः (bhūyaḥ) - again, further

(indeclinable)

कृथाः (kṛthāḥ) - (with 'mā') do not do, do not act (you should do, you should make)

(verb)

2nd person , singular, middle, aorist (luṅ) of kṛ

Root: kṛ (class 8)

Note: Used here in injunctive sense with 'mā' for prohibition.

क्वचित् (kvacit) - (with 'mā') never, nowhere (ever, at any time, anywhere)

(indeclinable)