Question

encroach
  on/upon

Accepted Answer

1 to
  advance into (someone's else's land etc): I n making his garden larger, he
  enroached on Mr.Brown's wood. 2 to remove part of (someone's right, privilege
  etc) unjustly: Is the Government slowly encroaching on the liberty of the
  individual?

Someone's Encroach On/Upon Advance Else's Land I N