Impinge
Part of speech: verb
Definition: To make a physical impact (on); to collide, to crash (upon). To interfere with; to encroach (on, upon). To have an effect upon; to limit.
Entrench
Part of speech: verb
Definition: To dig or excavate a trench; to trench.To surround or provide with a trench, especially for defense; to dig in.To establish a substantial position in business, politics, etc.