Hippopotomonstrosesquipedaliophobia
Look up hippopotomonstrosesquipedaliophobia in Wiktionary, the free dictionary.
Hippopotomonstrosesquipedaliophobia is a jocular term for a phobia, indicating a fear of long words.
Etymology
Hippopoto- is claimed to mean "big" due to its allusion to the Greek-derived word hippopotamus (though this is derived as hippo- "horse" compounded with potam-os "river", so originally meaning "river horse"); -monstr- is from Latin words meaning "monstrous", -o- is a pseudo-Greek noun-compounding vowel; -sesquipedali- comes from "sesquipedalian" meaning a long word (literally "a foot and a half long" in Latin), -o- is a pseudo-Greek noun-compounding vowel, and -phobia means "fear".