There are two separate issues here, etymological and (if you will) epistemological. A word can be a perfectly good word while having a totally screwed-up etymology (eg, television). Conversely, a word can be fine etymologically but not exist as a genuine English word (logoclopy could mean 'plagiarism,' but doesn't). This [epicaricacy] has a bad etymology and is also not a word: nobody uses it... The words of English are the words used by English speakers, and no English speaker has ever used this word other than artificially (citing it in language threads). As I said earlier in this thread, schadenfreude has far greater claim to English-word status.