less形容詞后綴的單詞

　　careless

　　adj.not taking care;thoughtless不小心的，粗心的

　　Careless smokers throw their cigarette butts into the subway vent,blocking it up.

　　粗心的煙民把煙蒂扔進(jìn)地鐵的通風(fēng)孔里，造成了堵塞。