Definition of "prefixal" []

• That may be modified by the addition of a prefix. (adjective)
• Taking the role of a prefix. (adjective)

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• "In addition, there is a widespread pragmatically motivated tendency for a formal or semantic contradictory negation to be strengthened to a contrary through such processes as litotes (“I don't like prunes” conveying that I dislike prunes) and so-called negative raising (“I don't think that Φ” conveying “I think that ¬Φ”); similarly, the adjective-forming prefixal negation in such words as “unhappy” or"