The most common negative prefixes in English are in-, un-, non-, de-, dis-, a-, anti-, im-, il-, and ir-. While some of these prefixes are interchangeable in some uses, there are subtle differences between them. in-, im-, il-, ir- The in- prefix (from which im-, il-, and ir- are derived) is generally the least useful of the negative prefixes, as it only goes with certain Latin-derived stems (e.g., intolerant, inarticulate, impenetrable), is highly conventionalized, and is identical to morphemes used … Continue reading Negative prefixes