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
Unclear or unreliable.
Experiencing or showing doubt, sceptical.
Subject to, or causing doubt.
Improbable or unlikely.
Suspicious, or of dubious character.
Undecided or of uncertain outcome.
A doubtful person or thing.