Conflict, as between persons having dissimilar ideas or interests; clash.
The rubbing of one object or surface against another.
A force that resists the relative motion or tendency to such motion of two bodies in contact.
(Second Sino-Japanese War) Conflict, as between the Communists and non-Hanjian Kuomintang forces.
A collision where the front ends of two vehicles (such as ships, trains, cars, planes, etc.) hit each other, as opposed to a side-collision or rear-end collision.