For many months now, we have heard world leaders speak of the threat posed by ISIS , IS and ISIL.
But in the wake of the devastating terror attacks in Paris on Friday, we have seen another word being used with increasing frequency.
When French president Francois Hollande addressed a nation in mourning following the tragic events, he said they were "waged by a terrorist army, a jihadist army, by Daesh, against France."
Hacker group Anonymous also included the term 'Daesh' in a tweet published yesterday in which they vowed to 'wage war' on Islamic State.
Many of us might not have heard the term 'Daesh' before - but you'll probably be hearing it much more often from now on.
Daesh is an acronym for the Arabic phrase al-Dawla al-Islamiya al-Iraq al-Sham (Islamic State of Iraq and the Levant).
Essentially, it's another word for ISIS - but apparently one that ISIS militants do not favour.
Why? Because it is similar to the Arabic words 'Daes', 'one who crushes something underfoot' and 'Dahes', translated as 'one who sows discord'.
In January this year, Australian Prime Minister Tony Abbott announced that he would begin referring to the Islamic State group by this name, saying: "Daesh hates being referred to by this term, and what they don't like has an instinctive appeal to me."
It seems that other world leaders have now followed suit, with French president Francois Hollande and the USA's secretary of state John Kerry both using the term.
According to NBC, ISIS has reportedly threatened to 'cut out the tongues' of anyone it hears using the term.
Evan Kohlmann, a national security analyst, told NBC: "It's a derogatory term and not something people should use even if you dislike them."
ISIS have claimed responsibility for the series of coordinated terror attacks that rocked the French capital on Friday night, leaving at least 129 people dead.
By Nicola Oakley
