Ma'anar ƙamus na aneurysm (wanda aka rubuta da "y" maimakon "i") wani yanki ne, mai cike da jini (balloon) na magudanar jini wanda cututtuka ko raunana bangon jirgin ruwa ke haifarwa. Yawanci ana siffanta shi da kumbura ko kumburin wurin da abin ya shafa kuma yana iya faruwa a kowane bangare na jiki, amma galibi yana shafar arteries da ke ba da jini ga kwakwalwa, aorta, da sauran manyan gabobin. A wasu lokuta, aneurysm na iya fashewa, wanda zai haifar da zubar da jini mai barazana ga rayuwa da sauran matsaloli masu tsanani.