inroad
noun
1. an encroachment or intrusion
- they made inroads in the United States market
Definition categories: act, encroachment, intrusion, trespass, usurpation, violation
2. an invasion or hostile attack
verb
1. (obsolete, transitive) To make an inroad into; to invade.
- The Saracens […] conquered Spain, inroaded Aquitaine. — Fuller.