(每日一词）credulous

Credulous  /ˈkredʒ.ə.ləs/ adj. 轻信的；易上当的

meaning: too willing to believe what you are told and so easily deceived 

词根：cred- 相信（credit card 信用卡, incredible 难以置信的）

后缀：-ulous 形容词后缀，含义表“多”