har.um-scar.umadj.(形容词)Lacking a sense of responsibility; reckless.轻率的:缺乏责任感的;冒失莽撞的adv.(副词)With abandon; recklessly.轻率地:轻举妄动地;冒失莽撞地来源:From hare [to frighten] 源自 hare [惊吓] scare scare