deep–root·ed 
/ˈdi:pˈru:təd/ adjective
/ˈdi:pˈru:təd/ adjective [more deep–rooted; most deep–rooted] : existing for a long time and very difficult to change : firmly established
▪ The country's economic troubles are deep-rooted. [=deep-seated] ▪ deep-rooted beliefs
▪ The country's economic troubles are deep-rooted. [=deep-seated] ▪ deep-rooted beliefs
