I've just asked a question (How is this screw head called?) which has been marked as duplicate. Indeed, after seeing the original one, I realize it had been asked.
The reason I had not found it was because I used the terms "screw" and "tamper proof" when searching, while the question uses "bolt" and "security".
How can I merge my words into the older question, so that future searches will be able to find it? Should I just add a new answer with my words? Or is there a better way?