Scissors can also suggest a sharp, hurtful tongue or cutting remarks. Dreaming of sharpening scissors suggests that we need to be more precise in our communication, whereas using blunt scissors suggests that we are likely to create a problem through speaking too bluntly.
The type of scissors may also be important. Kitchen scissors would, for instance, be more utilitarian than surgical scissors, which would suggest the necessity to be more precise. Consult the entries for kitchen, surgery and thread for further clarification.