IS Linked Group Says It Killed Croatian Man

sever – v. to cut off (something) : to remove or separate (something) by cutting

participation – n. involvement with others in doing something: the act of taking part in an activity or event with others

deadline  – n. a date or time when something must be finished : the last day, hour, or minute that something will be accepted

expire – v. to end : to no longer be valid after a period of time

headline – n. the title written in large letters over a story in a newspaper

insurgency – n. a usually violent attempt to take control of a government : a rebellion or uprising