Opposed; contradictory; inconsistent.
Opposite; in an opposite direction; in opposition; adverse.
Given to opposition; perverse; wayward.
One of a pair of propositions that cannot both be simultaneously true, though they may both be false.
The opposite.
Contrarily
Discordant; inharmonious; disconsonant; not in keeping with; not agreeable with; disagreeing.
not preserving the sign; of opposite sign or zero