湖こ底てい

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

lake bottom; bottom of a lake

Refers to the floor or deepest part of a lake. Often used in descriptive, scientific, or news contexts.

• 湖こ底ていには沈しずんだ船ふねが眠ねむっている。

  A sunken ship lies at the bottom of the lake.

• 湖こ底ていの地ち形けいを調ちょう査さする。

  Survey the topography of the lake bottom.