That is diametrically opposed to something.
That contradicts something, such as an argument.
That is itself a contradiction.
Mutually exclusive.
Tending to contradict or oppose, contrarious.
Either of a pair of propositions, that cannot both be true or both be false.
consisting in the absence of something; negative
causing privation; depriving
indicating the absence of something
something that causes privation or indicates an absence