in a way that suggests someone is morally strong enough not to be persuaded to do something wrong

He was an incorruptibly principled defender of self-government. 他廉洁、有原则，是自治政府的捍卫者。

in a way that will not decay or be destroyed

Customer information is securely and incorruptibly protected. 客户信息受到安全、无懈可击的保护。