The oppositionType your answer here...
One who opposes is called an adversary or an opponent. They are someone who is against or in conflict with another person or group.
Friction.
The force that opposes motion when moving objects over a surface is called friction
The force that opposes motion when moving objects over a surface is called friction
Drag
property of a conductor that opposes the flow of charge passing through it
resistance (friction)
Drag
The resistance force
Such force is called viscosity..the force produces in liquid and opposes the motion of fluid and also the motion of the objects in fluid..it is also called the internal friction..
Traditionalist
resistance
afterload