Because it is a combination of "mono-" from the Greek meaning "one"; the root from "syllable", and the suffix "-ic" to make an adjectival form. More to the point, why does "univocalic" have 4 different vowels? Shouldn't it be "onovocoloc"? And why is "long" short? And why don't we make it compulsory to write "red" in red every time we write it? Or "upside-down" upside-down? Or "stretched" stretched? Or [continued on page 94]