The word "fi" is a prefix that means "not" or "without." It is used to give a negative or opposite meaning to the word it is attached to. Full definition
This plan offers you 2 GB a month anytime data and unlimited Wi - Fi hotspot access. (pocket-lint.com)
Reception with friendly and helpful staff and free Wi - Fi Internet in all areas. (loveholidays.com)
Although its a nominal cost, it is kind of important because otherwise its Wi - fi only connection which may impact the 4K quality. (bestnewestlatest.com)