Irruption /(?)/

Ir·rup·tion

Irruption

n.
  1. A bursting in; a sudden, violent rushing into a place; as, irruptions of the sea.
    Lest evil tidings, with too rude irruption Hitting thy aged ear, should pierce too deep.
  2. A sudden and violent inroad, or entrance of invaders; as, the irruptions of the Goths into Italy.