The term Wi-Fi does not mean anything.
Why it is true
Wi-Fi was a name invented by a marketing company for a wireless communication standard. In fact, it does not mean anything in particular. It was chosen because it sounded good and was easy to remember.
Source: Interbrand
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.