untenable◼◼◼(Not able to be held, as of an opinion or position) adjective [UK: ʌn.ˈte.nəb.l̩] [US: ʌn.ˈte.nəb.l̩]
excruciating◼◼◻(Causing great pain or anguish, agonizing) adjective [UK: ɪk.ˈskruː.ʃɪeɪt.ɪŋ] [US: ɪk.ˈskruː.ʃi.ˌet.ɪŋ]The pain is excruciating. = La douleur est insoutenable.
insoutenablement adverbe
unbearably(in an unbearable manner) adverb [UK: ʌn.ˈbeə.rə.bli] [US: ʌn.ˈbe.rə.bli]