To tell lies about.
To give a false representation of.
To contradict, to show (something) to be false.
Her obvious nervousness belied what she said.
To conceal the contradictory or ironic presence of (something).
His calm demeanor belied his inner sense of guilt.
To show, evince, demonstrate: to show (something) to be present, particularly something deemed contradictory or ironic.
To mimic; to counterfeit.
To fill with lies.