ENCROACH
- to enter by gradual steps or by stealth into the possessions or rights of another.
- to advance beyond the proper limits [v ENCROACHED, ENCROACHES, ENCROACHING]
- to intrude on another's territory [v -ED, -ING, -ES]
- Intrude on (a person's territory or a thing considered to be a right)
- Advance gradually beyond usual or acceptable limits
- is often followed by on or upon.