Webster’s Revised Unabridged Dictionary · 1913
Inroad
In′road′ (ĭn′rōd′), n. The entrance of an enemy into a country with purposes of hostility; a sudden or desultory incursion or invasion; raid; encroachment.
The loss of Shrewsbury exposed all North Wales to the daily inroads of the enemy. Clarendon.
With perpetual inroads to alarm, Though inaccessible, his fatal throne. Milton.
Syn. — Invasion; incursion; irruption. See Invasion.
In·road′ (ĭn·rōd′), v. t. [imp. & p. p. Inroaded; p. pr. & vb. n. Inroading.] To make an inroad into; to invade. [Obs.]
The Saracens . . . conquered Spain, inroaded Aquitaine. Fuller.