Sewak (with an S followed by an E) is a term refereeing to the verb of using the sewak which is literally (Isteyak) and to the tool that is used in (isteyak). The tool is also called Miswak (with an M followed by and E). So, it can be said: saka his mouth, yasokoho sawkan. Thus, if it is said: istaka, it is not necessary to mention the mouth after it. Sewak is derived from saka which means rubbed. According to the terminology of Shari'ah scholars, there are many definitions for the word sewak. Hanafis defined it as: A name of a particular piece of wood that is used for isteyak. Malikis defined sewak as: Using a wooden stick or a similar object with tooth in order to remove the yellowness and smell of the tooth. .