When you reveal state secrets to an enemy of your country, this is an example of treason.
Origin of treason
- Middle English from Anglo-Norman treson from Latin trāditiō trāditiōn- a handing over tradition
From American Heritage Dictionary of the English Language, 5th Edition
- From Middle English tresoun, treison, from Anglo-Norman treson, from Old French traÃ¯son (“treason"), from Latin trÄditiÅnem, accusative of trÄditiÅ (“a giving up, handing over, surrender, delivery, tradition"), from trÄdÅ (“give up, hand over, deliver over, betray", verb), from trÄns- (“over, across") +"Ž dÅ (“give").