Disfix

In linguistic morphology, a disfix is a subtractive morpheme, a morpheme manifest through the subtraction of segments from a root or stem. Although other forms of disfixation exist, the element subtracted is usually the final segment of the stem.

Productive disfixation is extremely rare among the languages of the world but is important in the Muskogean languages of the southeastern United States. Similar subtractive morphs in languages such as French are marginal.