An incompatibility, as of two things that cannot be simultaneously fulfilled.
A clash or disagreement, often violent, between two or more opposing groups or individuals.
To overlap (with), as in a schedule.
To be at odds (with); to disagree or be incompatible
The act of resisting, or the capacity to resist.
An underground organisation engaged in a struggle for liberation from forceful occupation; a resistance movement.
A force that tends to oppose motion.
electrical resistance.