Knee-deep (adjective)

  1. Submerged up to the knees.
  2. Heavily involved or committed to a particular situation or activity.

Origin:

Compound of knee and deep.

Examples:

  1. After the storm, the streets were knee-deep in water.
  2. She was knee-deep in the planning for the upcoming event.
Some random words: sizable, boatload, ungrammatical