heedless
adjective formal uk/ˈhiːd.ləs/ us/ˈhiːd.ləs/
掉以轻心的，不注意的
not giving attention to a risk or possible difficulty
Heedless destruction of the rainforests is contributing to global warming. 对雨林的肆意破坏正在加重全球变暖的趋势。
Journalists had insisted on getting to the front line of the battle, heedless of the risks. 记者们不顾危险坚持来到战斗前线。