preficize

verb
To add an incorrect prefix to a word to make a new word that is understandable, even though it is not necessarily a real word.

see sufficize

"un-" (opposite of, contrary to) + "fast" (characterized by quick motion, operation, or effect) = "unfast" (not a real word, but preficized so you know it means slow)

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Prefice

The angle of curvature of ones erect penis

But, Everyone has a different prefice.