In Brideshead Revisited, the novel I've just finished re-reading, Evelyn Waugh uses a number of big words, including "manumission".
Do you know what it means? Without looking it up. I didn't.
As a postscript, I have a vague idea there was a popular club of this name in Ibiza a few years back, but I may be wrong. I didn't think clubbers were that literate.