That was one form of interaction that might betray her identity.

Any reluctance now might betray his real identity to the friendly Chip.

The lights of the street did not betray his false identity.

He'd betrayed his identity to no one.

Because one of the saboteurs said or did something that betrayed their identity to the two engineers.

Number One had not taken any chances of betraying his grim identity, even to the thugs who worked for him.

A furious Dion calls the police to rebut this, betraying his identity.

Next morning his wife came and, without thinking, betrayed the guest's identity.

He does not see anything in her appearance, however, that betrays her secret identity.

"But those eyes might betray your true identity one day."