I learned about 16 years ago on a Solaris course that /usr wasn’t “user”, I still say “user”, but I’m happy to see the information spreading that that isn’t what it actually is.
I used to pronounce it like yuzr, knowing that it wasn’t user, but not knowing what it was.
Now I have better context. Maybe I’ll go with U.S.R.
If you want to confuse people… I pronounce /etc as “ets”, but one of my coworkers recently called it “slash e t c” and I had to ask him to repeat it a couple times before I figured out what he meant…