thoughtless

a.粗心的；疏忽的

thorax, thorn, Thorne Middle School, thorny, thorough, thoroughbred, thoroughfare, thoroughgoing, thoroughly, thoroughness, those, thou, though, though (also tho), thought, thought-provoking, thought-reader, thoughtful, thoughtfully, thoughtfulness, thoughtlessly, thoughtlessness, thousand, Thousand Island dressing, thousandfold, thousands of, thousandth, thrash, thrashing, thread, threadbare, threadlike, threat, threaten, threaten with, threatening, three, three-, three-decker, three-legged,