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

• absenteeism
• absentia
• absently
• absentminded
• absentmindedly
• absentmindedness
• absinth
• absinthe
• absinthe oil
• absolute
• absolute address
• absolute alcohol
• absolute ceiling
• absolute frequency
• absolute magnitude
• absolute majority
• absolute pitch
• absolute scale
• absolute space
• absolute temperature
• absolute threshold
• absolute value
• absolute viscosity
• absolute zero
• absolutely