adj. 粗心的;無憂無慮的;漫不經心的,不介意的;淡漠的;
?? care關心 + less不...的 → a.粗心的,漫不經心的
"It was careless of me to leave the door open."
怪我粗心忘了關門。
近義:thoughtless, slovenly, imperviable, impervious, imprudent, inadvertent
反義:heedful, intent, mindful, observant, vigilant, watchful