Infuriatingly tells you how something happens: in a way that makes you very angry, or at least very annoyed. It often sits in front of an adjective: infuriatingly slow, infuriatingly calm, infuriatingly late. The slow wifi is not just slow; the slowness itself gets under your skin. You can also put it with a whole clause: Infuriatingly, the shop had closed one minute early. The tone is complaining, but not slang — you can use it in a story or a complaint to a friend. Though actually, like infuriating, it is used more loosely than the old “fury” in the middle of the word. Infuriatingly calm does not mean the person is in a rage; it means their calm is what is driving you up the wall.

氣死人地；令人火大地