Infix
It contrasts with adfix, a rare term for an affix attached to the outside of a stem, such as a prefix or suffix.An example is اجتهد ijtahada "he worked hard", from جهد jahada "he strove".These elements are no longer productive, and occur crystallized in words inherited from Old Khmer.Tmesis, the use of a lexical word rather than an affix, is sometimes considered a type of infixation.In order for -al- to be considered an infix, it would have to have been inserted in the non-existent word *originly.The "infixes" in the tradition of Bantu linguistics are often sequences of prefixes of this type, though there may be debate over specific cases.