16th Century; Greekfrom Middle English abissus, from Late Latin abyssus, from ábyssos ‘bottomless’ or byssós ‘bottom of the sea’

1.anything profoundly unfathomable or eternal

2.a vast chasm, or a deep immeasurable space or cavity

1.A) No one can quite comprehend the abyss of time. B) Those experiencing homelessness may be slipping deeper into the abyss of despair.

2.A) Rare sea life exists in the abyss of the ocean. B) The hikers stood on the ledge of the abyss in awe.