The Collaborative International Dictionary of English v.0.48:

entangled \entangled\ adj.
   1. in a confused mass. Contrasted with untangled. [Narrower
      terms: afoul(postnominal), foul, fouled; knotted,
      snarled, snarly; matted; rootbound; intertwined]

   Syn: tangled.
        [WordNet 1.5]

   2. deeply involved especially in something problematic; as,
      entangled in the conflict.

   Syn: embroiled.
        [WordNet 1.5]

   3. constrained by or as if by a convoluted rope or net;
      ensnared.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

rootbound
    adj 1: (of a potted plant) grown too large for its container
           resulting in matting or tangling of the roots [syn:
           potbound, rootbound]
    2: having the roots matted or densely tangled; "shaggy untended
       lawns of old trees and rootbound scented flowers and shrubs"-
       William Faulkner