importunate
From Longman Dictionary of Contemporary Englishimportunateim‧por‧tu‧nate /ɪmˈpɔːtʃənət $ -ɔːr-/ adjective formal ANNOYcontinuously asking for things in an annoying or unreasonable way importunate demands —importunity /ˌɪmpəˈtjuːnəti $ -pərˈtuː-/ noun [uncountable]Examples from the Corpusimportunate• It might have sounded as flippant as the question was importunate.• And there you are importunate even as I am.• Regrettably, however, she felt that Edwin's importunate letter must be taken seriously.