gan ‧ grene /ˈɡæŋɡriːn/ BrE AmE noun [uncountable]
[ Date: 1500-1600 ; Language: Latin ; Origin: gangraena , from Greek gangraina ]
a condition in which your flesh decays in part of your body, because blood has stopped flowing there as a result of illness or injury
—gangrenous /-ɡrɪnəs/ adjective