A doubled verb in Arabic, https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315620091/1e85dcd9-67fa-4282-a164-2a1659972fa7/content/inline1965.tif"/> is a triliteral verb (three-radical verb) whose second and third radicals are identical and have the same vowel. In the basic form they are thus written as one, with šaddah above. This phenomenon is called https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315620091/1e85dcd9-67fa-4282-a164-2a1659972fa7/content/inline1966.tif"/> 'contraction': https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315620091/1e85dcd9-67fa-4282-a164-2a1659972fa7/content/fig29_313.tif"/>