Friction

Friction may refer to: https://en.wikipedia.org/wiki/Friction_(disambiguation)

• Friction, the force that opposes the relative motion or tendency of such motion of two surfaces in contact
• Friction, a concept introduced by Carl Von Clausewitz to name how the simple things become difficult in war because of many misfortunes and mistakes. It's the disparity between the optimal performance of units, organisms or systems versus their degraded performance in combat (Book I, Chapter VII)
• A Market with friction is a financial market with Transaction Costs.

See Friction-Free