in-

1. usu indicates some kind of change or modification of an action, expressed by a verbal root: inwagjan "to be troubled, to be upset" < wagjan "to wobble; to sway"; 2. expresses completed / perfective meaning: intandjan "to burn down" < tandjan "burning"; insaiƕan "to look" < saiƕan "seeing"; 3. oft has an intens meaning: inmaidjan "to change; to transform" < maidjan "to change; to deform"