"Your words betray you; anyone native to this planet would not need to ask."

She made the slightest nod, as though acquiescing to his thought, but her words did not betray it.

Only his words betrayed the deep concern he felt.

And those two words betrayed his defeat, his love for her.

Sometimes, only grunts issued from her, as though words might betray her.

Ravi's words betrayed no anxiety, but he was very focused.

I let my words betray me so she would attack me, and force their hand.

Every word you've said about your Chem society betrays you.

He acted tough, even if his words betrayed his attitude.

He took a chance that one word wouldn't betray them.