layaḥ - the annihilation; prākṛtikaḥ - of the material elements; hi - indeed; eṣaḥ - this; puruṣa - of the Supreme Lord; avyaktayoḥ - and of His material nature in its unmanifest form; yadā - when; śaktayaḥ - the energies; sampralīyante - merge totally; vivaśāḥ - helpless; kāla - by time; vidrutāḥ - disarrayed.

This is the annihilation called prākṛtika, during which the energies belonging to the Supreme Person and His unmanifest material nature, disassembled by the force of time, are deprived of their potencies and merge together totally.