A knife grinder refers to a person who sharpens knives professionally. However, there are several synonyms that can be used to refer to the same person, such as a sharpening professional or a blade sharpener. Additionally, some people might refer to a knife grinder as a cutlery sharpener or a knife honer. Other possible synonyms include blade grinder, sharpening technician, sharpening expert, and edge sharpener. Regardless of the term used, a knife grinder's job is to ensure that knives and other cutting tools are always sharp and ready for use. They can work in various settings, ranging from restaurants and butcher shops to home appliance stores.