'abyssus' originates from Latin, specifically the word 'abyssus', where 'a-' meant 'without' and 'byssus' meant 'bottom'.

'abyssus' changed from the Latin word 'abyssus' and eventually became the modern English word 'abyss'.

Initially, it meant 'bottomless pit', but over time it evolved into its current meaning of 'a deep or seemingly bottomless chasm'.