careless

a.粗心的，疏忽的

cardboard, cardi(o)-, cardiac, cardigan, cardinal, cardinal points, cardiologist, cardiology, care, care about, care for, care nothing about, careen, career, career girl (also career woman), careerist, carefree, careful, carefully, carefulness, carelessly, carelessness, caress, caret, caretaker, careworn, carfare, cargo, Caribbean, caribou, caricature, caricaturist, caries, carillon, caring, carious, Carmelite, carmine, carnage, carnal,