attrition

noun

1.
erosion by friction
abrasion corrasion detrition
Derived from:
attritional
2.
the wearing down of rock particles by friction due to water or wind or ice
fridging weathering abrasion detrition grinding
Derived from:
attritional
3.
sorrow for sin arising from fear of damnation
contriteness contrition
4.
a wearing down to weaken or destroy
Derived from:
attritional
5.
the act of rubbing together; wearing something down by friction
Derived from:
attritional