IS Delivers More Deadly Bombings in Iraq

vest – n. a garment worn on the upper part of the body

shift – n. a change in position or direction

desperate – adj. extremely bad, serious or dangerous

retreat – v. to move back or withdrawal

caliphate – n. the area ruled by a caliph

perverse – adj. contrary to accepted or expected standard of practice

downplay – v. to make something appear less important than it really is