hippopotomonstrosesquipedalianism

== English == === Etymology === From hippopotomonstrosesquipedalian +‎ -ism. === Pronunciation === IPA(key): /ˌhɪpəˌpɒtəˌmɒnstɹəˌsɛskwɪpɪˈdeɪlɪənɪzəm/ === Noun === hippopotomonstrosesquipedalianism (countable and uncountable, plural hippopotomonstrosesquipedalianisms) (humorous, uncountable) The use of extremely long words. (humorous, countable) An extremely long word. === See also === sesquipedalian hippopotomonstrosesquipedaliophobia hippopotomonstrosesquipedalian