The word desvelas is the present form of desvelar in the second person singular.
See the full desvelar conjugation


Si desvelas tu participación en esto al presidente, iras a prisión.
If you reveal your part in this to the President, you'll go to prison.
Beletski, ¿te desvelas de noche pensando en ese tipo de cosas?
Beletsky, do you stay awake at night thinking of the things you should worry about?
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