Shayṭāan (Arabic: شيطان)or Shaitan refers to Satan.
"Shayṭāan" (شيطان, from the root šṭn شطن) is both a noun and an adjective. As a noun it means "adversary" or "enemy" or "opponent," and as an adjective it means "adversarial," "opposing," or "evil."
In Islam, Allah created everything in pairs. The pair for a human is a jinn, two beings of higher intelligence created with free will. Qu'ran tells that the jinn race was created long, long before the human race. And, for long time humans were nothing, not even mentioned.
Has there not been over human a long period of time, when he was nothing - (not even) mentioned? (verse 1) chapter 76.
Allah created al-Ins (human) from sounding clay like unto pottery (14), and Allah created al-Jinn (jinn) from fire free of smoke (15): Then which of the favors of Rabbkum (your Sustainer and Nurturer) will you deny? (verse 16) chapter 55.
Iblis was of jinn race and was a devoted servant of Allah. He attained a very high status and was brought close with the Angels. But Allah knew Iblis well and the intentions of Iblis and therefore the Shayṭāan was named Iblis (meaning "desperate"). The angels do not have free will and do not sin, because they do not know how to sin. When Allah created human, Allah commanded all the angels to prostrate (sujood) to Adam. All angels did so, except Iblis, who refused Allah's direct command.
Iblis was proud and considered himself superior to Adam, since Adam was made from clay and Iblis was created from smokeless fire. For this act of disobedience, Allah cursed the Shayṭāan to the Hell Fire for eternity, but gave the Shayṭāan the respite until the Day of Judgment at his request. Iblis obtained permission from Allah and vowed that he would use this time to lead all men and women astray to be devoured in the Hell Fire. Allah grants the request but warns the Shayṭāan that it would have no authority over Allah's sincere and devoted servants.