Final answer:
The word and suffix meaning stopping or controlling is 'stasis', used in medical terms like 'hemostasis'.
Step-by-step explanation:
The word that is also a suffix meaning stopping or controlling is d) Stasis. Stasis is a term used in medicine to describe a stoppage or slowdown in the flow of blood or other body fluids, such as lymph. It does not only pertain to a complete stop but can also refer to a significant decrease in the flow or movement. In the context of suffixes, '-stasis' can be added to the end of other medical terms to denote control or maintenance of a constant level, as in 'hemostasis', which refers to the stopping of bleeding.