Since the rise of the so-called 'Islamic State' to notoriety in 2014 the group has become known by many terms, including IS, ISIS and ISIL.
Another term that has also emerged, however, is 'Daesh'.
French President Francois Hollande used it after the large-scale terror attacks in Paris in November 2015, which were claimed by the group.
He said the attacks were "waged by a terrorist army, a jihadist army, by Daesh, against France."
US Secretary of State John Kerry has also used the term to describe Islamic State, whilst hacker group Anonymous used it while promising to 'wage war' on the extremists.
IS, meanwhile, has threatened to 'cut out the tongues' of anyone it hears using the term, according to American outlet NBC News.
But what does it mean - and why do Islamic State hate it so much?
'Daesh' is an acronym for the Arabic phrase al-Dawla al-Islamiya al-Iraq al-Sham - 'Islamic State of Iraq and the Levant'.
IS hate it because it's similar to two Arabic words: 'Daes', which translates to 'one who crushes something underfoot', and 'Dahes', meaning 'one who sows discord'.
In early 2015 Tony Abbott, then-Prime Minister of Australia, announced that he would begin referring to Islamic State as such, saying:
"Daesh hates being referred to by this term, and what they don't like has an instinctive appeal to me."
But others have warned against using the term to describe the terror group.
National security analyst Evan Kohlmann told NBC:
"It's a derogatory term and not something people should use even if you dislike them. It would be like referring to Germans as 'Huns'.”
Do you think people should refer to IS as 'Daesh'? Comment below or on our social media pages to let us know.