Islām (Arabic: إسلام) is a verbal noun originating from the triliteral rootS-L-M which forms a large class of words mostly relating to concepts of wholeness, submission, sincerity, safeness, and peace. In a religious context, it means "voluntary submission to God".Islām is the verbal noun of Form IV of the root, and means "submission to God" or "surrender to God". Muslim, the word applied to an adherent of Islam, is the active participle of the same verb form, and means "submitter to God" or "one who surrenders to God". The word sometimes has distinct connotations in its various occurrences in the Quran. In some verses, there is stress on the quality of Islam as an internal spiritual state: "Whomsoever God desires to guide, He opens his heart to Islam." Other verses connect Islam and religion (dīn) together: "Today, I have perfected your religion (dīn) for you; I have completed My blessing upon you; I have approved Islam for your religion." Still others describe Islam as an action of returning to God—more than just a verbal affirmation of faith. In the Hadith of Gabriel, islām is presented as one part of a triad that also includes imān (faith), and ihsān (excellence).
Islam was historically called Muhammadanism in Anglophone societies. This term has fallen out of use and is sometimes said to be offensive because it suggests that a human being rather than God is central to Muslims' religion, parallel to Buddha in Buddhism. Some authors, however, continue to use the term Muhammadanism as a technical term for the religious system as opposed to the theological concept of Islam that exists within that system.