Tending to contradict or oppose, contrarious.
That contradicts something, such as an argument.
That is diametrically opposed to something.
That is itself a contradiction.
Mutually exclusive.
Either of a pair of propositions, that cannot both be true or both be false.
Causing obstruction; blocking up.
A consonant sound formed by obstructing the airway, causing turbulence; a plosive, fricative, or affricate.
Hypernym: consonant
Anything that obstructs, especially in the passages of the body.