Home › Words › M › misascertainmentmisascertainment/ˌmɪsəˈsɜːtənmənt/misascertainment means incorrect ascertainment.misascertainment is pronounced /ˌmɪsəˈsɜːtənmənt/.EtymologyFrom mis- + ascertainment.nounIncorrect ascertainment.Definitions & examples from Wiktionary (CC BY-SA 3.0).