WordWeb Online

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

Derived forms: impinging, impinged, impinges

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