In Arabic, Islām means "submission" and is described as a Dīn, meaning "way of life" and/or "religion." Etymologically, it is derived from the same root as, for example, Salām meaning "peace" (also a common salutation). The word Muslim is also related to the word Islām and means "one who surrenders" or "submits" to God, or a "vassal" of God.

Source WordIQ