底そこなし

noun which may take the genitive case particle 'no', noun

bottomless; endlessly deep; infinite

Describes something that has no bottom or seems to have no limit, often used figuratively for insatiable appetite, endless capacity, or boundless depth.

• 彼かれの食しょく欲よくは底そこなしだ。

  His appetite is bottomless.

• 底そこなし沼ぬまに落おちた。

  I fell into a bottomless swamp.