महाभारतः mahābhārataḥ - book-5, chapter-140, verse-7

गाण्डीवस्य च निर्घोषं विस्फूर्जितमिवाशनेः ।
न तदा भविता त्रेता न कृतं द्वापरं न च ॥७॥

7. gāṇḍīvasya ca nirghoṣaṁ visphūrjitamivāśaneḥ ,
na tadā bhavitā tretā na kṛtaṁ dvāparaṁ na ca.

7. gāṇḍīvasya ca nirghoṣam visphūrjitam iva aśaneḥ
na tadā bhavitā tretā na kṛtam dvāparam na ca

7. gāṇḍīvasya nirghoṣam ca aśaneḥ iva visphūrjitam [drakṣyasi - implied] tadā tretā na bhavitā,
kṛtam na [bhavitā],
dvāparam na ca [bhavitā]

7. And when you hear the roar of Gāṇḍīva (Arjuna's bow), like the crash of a thunderbolt, then there will be no Tretā Yuga, no Kṛta Yuga, and no Dvāpara Yuga (meaning it will be a unique and unprecedented time).

Words meanings summery:

• गाण्डीवस्य (gāṇḍīvasya) - of Arjuna's bow (Gāṇḍīva) (of Gāṇḍīva)

• च (ca) - and

• निर्घोषम् (nirghoṣam) - sound, roar, loud noise

• विस्फूर्जितम् (visphūrjitam) - the crash/flash (of a thunderbolt) (thunder, crash, flash, burst)

• इव (iva) - like, as, as if

• अशनेः (aśaneḥ) - of a thunderbolt, of lightning

• न (na) - not, no

• तदा (tadā) - then, at that time

• भविता (bhavitā) - will be, will happen

• त्रेता (tretā) - Tretā Yuga (the second of the four yugas) (the Tretā age)

• न (na) - not, no

• कृतम् (kṛtam) - Kṛta Yuga (Satya Yuga, the first of the four yugas) (the Kṛta age)

• द्वापरम् (dvāparam) - Dvāpara Yuga (the third of the four yugas) (the Dvāpara age)

• न (na) - not, nor

• च (ca) - and

Words meanings and morphology

गाण्डीवस्य (gāṇḍīvasya) - of Arjuna's bow (Gāṇḍīva) (of Gāṇḍīva)

(proper noun)

Genitive, neuter, singular of gāṇḍīva

gāṇḍīva - Arjuna's bow

च (ca) - and

(indeclinable)

निर्घोषम् (nirghoṣam) - sound, roar, loud noise

(noun)

Accusative, masculine, singular of nirghoṣa

nirghoṣa - loud sound, roar, clang

Prefix: nir

Root: ghuṣ

विस्फूर्जितम् (visphūrjitam) - the crash/flash (of a thunderbolt) (thunder, crash, flash, burst)

(participle)

Accusative, neuter, singular of visphūrjita

visphūrjita - thundering, flashing, bursting, roaring

past passive participle (substantivized)

vi + root sphūrj + kta (past participle suffix)

Prefix: vi

Root: sphūrj (class 1)

इव (iva) - like, as, as if

(indeclinable)

अशनेः (aśaneḥ) - of a thunderbolt, of lightning

(noun)

Genitive, masculine, singular of aśani

aśani - thunderbolt, lightning, destructive weapon

न (na) - not, no

(indeclinable)

तदा (tadā) - then, at that time

(indeclinable)

भविता (bhavitā) - will be, will happen

(nominal form)

Nominative, feminine, singular of bhū

bhū - to be, to become, to exist

periphrastic future

root bhū + tṛ (nominal agent suffix) + nominative singular feminine ending, used as a future predicate

Root: bhū (class 1)

त्रेता (tretā) - Tretā Yuga (the second of the four yugas) (the Tretā age)

(noun)

Nominative, feminine, singular of tretā

tretā - the Tretā Yuga (second cosmic age); a triad

न (na) - not, no

(indeclinable)

कृतम् (kṛtam) - Kṛta Yuga (Satya Yuga, the first of the four yugas) (the Kṛta age)

(noun)

Nominative, neuter, singular of kṛta

kṛta - done, made; the Kṛta Yuga (Satya Yuga)

द्वापरम् (dvāparam) - Dvāpara Yuga (the third of the four yugas) (the Dvāpara age)

(noun)

Nominative, neuter, singular of dvāpara

dvāpara - the Dvāpara Yuga (third cosmic age); relating to two

न (na) - not, nor

(indeclinable)

च (ca) - and

(indeclinable)