dichotomy
Word family adjectivedichotomicdichotomousnoundichotomistdichotomyverbdichotomizeadverbdichotomously
di·chot·o·my /daɪˈkɒtəmi $ -ˈkɑː-/ noun (plural dichotomies) [countableC] formal SEPARATEthe difference between two things or ideas that are completely opposite 对立,截然相反dichotomy between a dichotomy between his public and private lives 他公众生活和私生活的两面性
Origin dichotomy (1500-1600) Greek dichotomia, from dichotomos “cut in two”