Sesquipedal

Sesquipedal is such an amazing and unusual word that the spell check thinks that it is spelled incorrectly. Sesquipedal is the adjective form of sesquipedalian, which is the noun form meaning, "A long word... 1. Given to the use of long words... 2. Long and ponderous; polysyllabic." It is very appropriate that such a definition should be such a long and ponderous word. Sesquipedal comes from Latin and means, "of a foot and a half in length." This word also contains the Latin stem ped- (foot) which we have already learned! 

- AHCD