 So for example, a reduplication of "kunet" 'child' is "ku-kunet" 'children', and a derivative of the root "petz-" 'smooth' is "pe-petz-ka" 'a kind of small, silvery fish', local Spanish "pepesca".Another more productive variety of reduplication involves adding a "j" after the reduplication, e.g., "ku-j-kunet" 'children', "pe-j-petz-naj" plural of "petz-naj" 'smooth, naked'.Generalizing, plain reduplication (without "j") is governed by lexical criteria.