You searched for: “prefixation
prefixation (s) (noun); prefixations (pl)
The formation of a word with an attachment to the front of a root or a word stem: Janet used some prefixations, like un at the beginning of "sightly", which produced "unsightly", and dis when writing "displeasure" which were useful when writing her story for the English essay competition.
This entry is located in the following unit: fix- (page 3)