dour C2+

/dʊɹ/ stern, gloomy, or forbidding in manner or appearance M S

endurable C2+

/ɪnˈdʊrəbəl/ able to be borne or tolerated M S

durative C2+

/ˈdʊrətɪv/ in grammar, denoting continuing or ongoing action M S

indurate C2+

/ˈɪndʊreɪt/ to make or become hard, or to harden in feeling M S

obdurate C2+

/ˈɑbdərət/ stubbornly unyielding or hardened against persuasion or moral influence M S