back-breaking /bˈækbɹˈeɪkɪŋ/ /bˈakbɹˈeɪkɪŋ/
unbearable /ʌnˈber.ə.bəl/ /ʌnˈbeərəbl/
exhausting /ɪgˈzɔː.stɪŋ/ /ɪɡˈzɔːstɪŋ/
