The other day I found myself explaining the word ‘wont’ to someone. Not the contraction ‘won’t’, but rather its apostrophe-less unrelated twin:
adjective: accustomed, used, given, inclined. e.g. “As he was wont to do”
— New Oxford American Dictionary
In other words, the one almost no-one uses. I believe I was attempting to add a vaguely historical flourish to a comment I was making. Unfortunately the person I was speaking to was German, and wont turned out to be a word they hadn’t yet added to their English vocabulary (can’t blame them really).