“Daesh,” a word the Islamic State hates.

Laura Reston explains:

Daesh is an acronym. It stands for the Arabic name of the Islamic State: al-Dawla al-Islamiya fi al-Iraq wa al-Sham. [...] Zeba Khan, writing for the Boston Globe, has explained why “Daesh” could be read as an insult: “Depending on how it is conjugated in Arabic, it can mean anything from ‘to trample down and crush’ to ‘a bigot who imposes his view on others.’” In light of its more unsavory connotations, ISIS leaders threatened last June “to cut the tongue of anyone who publicly used the acronym Daesh, instead of referring to the group by its full name,” according to the Associated Press.