abyss
noun
[ əˈbɪs ]
• a deep or seemingly bottomless chasm.
• "a rope led down into the dark abyss"
Similar:
chasm,
gorge,
ravine,
canyon,
fissure,
rift,
crevasse,
gap,
hole,
gulf,
pit,
depth,
cavity,
void,
bottomless pit,
Origin:
late Middle English (in the sense ‘infernal pit’): via late Latin from Greek abussos ‘bottomless’, from a- ‘without’ + bussos ‘depth’.
