Friction
Friction was a physical force created by two objects grating against each other. The term could also be used as a synonym for interpersonal conflict. (, , , )

In 2266, James T. Kirk reported in his captain's log that the 's outer skin was heating quickly as friction built between it and the atmosphere of Psi 2000. ()

Friction between two wooden sticks could lead to a buildup of  energy, ultimately creating fire. (, )

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Physics