1. Deeply involved
   "up to their necks in debt"
   - neck-deep, up to my neck, up to your neck, up to her neck, up to his neck, up to our necks

See also: involved

• climb-down
• climbable
• climber
• climbing
• climbing bird's nest fern
• climbing bittersweet
• climbing boneset
• climbing corydalis
• climbing fern
• climbing frame
• climbing fumitory
• climbing hemp-vine
• climbing hempweed
• climbing hydrangea
• climbing iron
• climbing lily
• climbing maidenhair
• climbing maidenhair fern
• climbing nightshade
• climbing onion
• climbing perch
• climbing salamander
• clime
• clinch
• Clinch River