trai·tor·ous·ly
adverb/ˈtreɪtərəsli/
/ˈtreɪtərəsli/
(formal)- in a way that betrays your friends, your country, etc. by giving away secrets about them, by lying to or about them or by doing other things that will harm them
通过泄露有关他们的秘密、对他们撒谎或做其他会伤害他们的事情来背叛你的朋友、你的国家等