curious about me:What is the only thing you can break when you its name?

What is the only thing you can break when you its name? What is the love? What is the SWIFT? What is the plants? what is the WWF? what is the ISO9000? What is the 暴走族 ? what is the dinosaurs There is a word of five words.If you take away two letters,only one remains.What is the word? Light is something that can be seen in the dark.What I can see is only the darkside of human nature