Islamic State of Iraq and Levant (ISIL) – Levant is a historical geographical term referring to a large area in the Eastern Mediterranean including Syria, Jordan, Israel/Palestine, Lebanon and partially Iraq. This was the primary goal for the terrorist organization to take over. That was the starting point for the caliphate.
Islamic State of Iraq and Syria (ISIS) – the geographic place where the terror organization actually did gain ground.
Daesh – If you say that to one of those terrorists they allegedly cut your tongue out. Why? Because it is similar to the Arabic words ‘Daes’, ‘one who crushes something underfoot’. It is also an acronym for the Arabic phrase al-Dawla al-Islamiya al-Iraq al-Sham (Islamic State of Iraq and the Levant).
These names bothered Trump quite a bit. He delivered some interesting arguments considering “no general knows more about ISIS than I do”:
Personally I go with “Daesh”. Mainly because I don’t recognize any of those areas being an Islamic State.