I always thought Wi-Fi meant wireless fidelity? (Or wireless fiction since in the end, everything is wired).
t was made to sound like Hi-Fi, which stands for high fidelity, and Wireless, but "wireless fidelity" is a meaningless phrase and not what it was intended to directly mean.
It doesn't, but the phrase was used in the early days.
https://boingboing.net/2005/11/08/wifi-isnt-short-for.html