inroad

An advance, especially at another’s expense; an encroachment.

A reduction or diminishment.

A hostile invasion; a raid.

To make an inroad into; invade.

To make an inroad; encroach; depredate.

A predatory or hostile incursion; a raid by public enemies; a temporary or desultory invasion.

Forcible entrance; powerful or sudden influx or incursion; forcible or insidious encroachment.

The entrance of an enemy into a country with purposes of hostility; a sudden or desultory incursion or invasion; raid; encroachment.

To make an inroad into; to invade.

an advance into enemy territory, an incursion, an attempted invasion