scour (v.) 1
clear out, quickly remove, cleanse
1H4 III.ii.137 [Prince Hal to King Henry] I will ... stain my favours in a bloody mask, / Which, washed away, shall scour my shame with it
H5 I.i.34 [Canterbury to Ely, of King Henry] Never came reformation in a flood / With such a heady currance scouring faults
H5 II.i.53 [Nym to Pistol] If you grow foul with me ... I will scour you with my rapier
Mac V.iii.56 [Macbeth to Doctor] What rhubarb, senna, or what purgative drug / Would scour these English hence?