misapprehension
Word family nounmisapprehensionmisapprehensivenessadjectivemisapprehensiveadverbmisapprehensivelyverbmisapprehend
mis·ap·pre·hen·sion /ˌmɪsæprɪˈhenʃən/ noun [countableC] under a misapprehension• Well, dear Rex was either lying or labouring under a misapprehension.