cuckold

/ˈkʌkoʊld/

妻子有外遇的人;戴绿帽子的人；A cuckold is a man whose wife is having an affair with another man. [LITERARY 文]
Arthur himself has been portrayed as a weak cuckold.
亚瑟王本人被描绘成一个被人戴绿帽子的软弱之人。