TIL! It's must be a fairly obscure one though. My English speaking colleagues and I had never heard of it, and it's not here https://www.dictionary.com/misspell

TIL! It's must be a fairly obscure one though. My English speaking colleagues and I had never heard of it, and it's not here https://www.dictionary.com/misspelling?term=unicity https://www.dictionary.com/misspelling?term=unicity