Able to get along well.
Capable of easy interaction.
Consistent; congruous.
Something that is compatible with something else.
unsuitable to needs or circumstances; inappropriate; inapt
Not properly named; See, for example, improper fraction
Not in keeping with conventional mores or good manners; indecent or immodest
Not consistent with established facts; incorrect
Of a complex random variable, correlated with its conjugate
Not according to facts; inaccurate or erroneous