knee-deep

adjective

1. reaching the knees: knee-deep mud.
2. submerged or covered up to the knees: knee-deep in water.
3. deeply embroiled; enmeshed; involved: knee-deep in trouble.

adjective

1. so deep as to reach or cover the kneesknee-deep mud
2. (postpositive often foll by in)
   1. sunk or covered to the kneesknee-deep in sand
   2. immersed; deeply involvedknee-deep in work