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Noun: impinging  im'pin-jing
  1. The physical coming together of two or more things
    - contact, striking
Verb: impinge  im'pinj
  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

Type of: advance, go on, happening, march on, move on, natural event, occurrence, occurrent, pass on, progress, take advantage, trespass