Towards the end of the Tābi‘ūn generation (the generation of Muslims who followed the Sahaba [companions of the prophet Muhammad]), there was a search for a name through history, for people who were members of Ahl as-Sunnah (people of the tradition and the community of Muhammad [peace be upon him]), and were distinguished from other people with their understanding of zuhd (asceticism) and faqr (indigence), and their sensitivity to worship and to abide by righteous deeds. In this process, any name other than Tasawwuf (Islamic mysticism, commonly known as Sufism) was not generally accepted because it was considered incomplete and inadequate in expressing the knowledge, state, behavior, and approaches of Sufi. The debate about the origin of the word Tasawwuf has continued from the first time to the present day. Some authors have argued that the original word was not in Arabic and hence it was not known during the time of Sahaba, while other authors have argued that it was in Arabic and that it was known in the time of Sahaba. Also, there were differences of opinion about the origin of the root word for Tasawwuf among the authors who argued that the origin of the word Tasawwuf was Arabic. When Sufi works are examined, it can be seen that each Sufi made many descriptions of Tasawwuf in accordance with the subjects they cared about and the state in which they lived. However, this study does not aim to examine the terminological descriptions of the notions of Tasawwuf expressed in the historical process, but to bring up some discussions about the origin of the word and to examine some issues related to the subject.