Complex sentence: The family has always appeared to be extraordinarily powerful in the criminal underworld and the DiMeras have the reputation as being cruel, twisted and ruthless in their pursuit of getting what they want and the name "DiMera" consistently strikes fear into the hearts of other criminals.
Split into simpler sentences: The family has always appeared to be extraordinarily powerful in the criminal underworld. The DiMeras have the reputation as being cruel, twisted and ruthless in achieving their goals and the name "DiMera" consistently strikes fear into the hearts of other criminals.