True
False.
The opposite of true (factual) is false. It might also be unreal or fictional. The opposite of true (direction) could be skewed or angled. The opposite of true (loyal, steadfast) could be disloyal, unfaithful, or fickle.
True, but if you are saying about someones appearance you may say natural.
Not for the usual definition of the word "opposite." The perpendicular of a line having a slope of 2 has a slope of -0.5.
True is the opposite of false, so the opposite of guilty would be innocent.
false
false
No true is the opposite to false and Faithful is opposite to unfaithful or disloyal
false
Truman
The opposite of relevant is irrelevant.
The opposite could be true, or real, genuine.