infringe (up)on (something)
To encroach on something. Well, if you don't want us infringing on your personal freedom, don't do anything that compels us to ground you for a month. Their new fence better not be infringing upon our land!
See also: infringe
infringe (up)on something
to interfere with the rights of someone or with someone's property rights; to encroach on something. (Upon is formal and less commonly used than on.) You are infringing upon my right to free speech. lam not infringing on your property. I'm in my own yard.