WordWeb Online

1. Gradually intrusive without right or permission
   "we moved back from the encroaching tide";
   - invasive, trespassing

1. Advance beyond the usual limit
   - infringe, impinge
    
2. Have a negative effect on, esp. by somehow restricting; infringe upon
   "This encroaches on my rights as an individual";
   - impinge, entrench, trench [archaic]

See also: intrusive

Type of: advance, go on, march on, move on, pass on, progress, take advantage, trespass

Encyclopedia: Encroach