Blisters can be caused by this resistance to motion between surfaces, from the Latin for "to rub"
[DOC] [TLE] Bio-friction | Duncan Dowson and Zhongmin Jin - Academia.edu [PAR] 2 Definition Friction is loosely defined as the resistance that one surface or 
object ... in medical treatment, via French from Latin frictio(n-), from fricare 'to rub'
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