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.
粗心的烟民把烟蒂扔进地铁的通风孔里，造成了堵塞。
fearless
adj.without fear大胆的
Our fearless platoon sergeant led the attack and was the first one to be injured.
我们天不怕地不怕的副排长带头发起了这次进攻，他也是第一个负伤的。
headless
adj.inattentive不注意的
A headless man haunts the castle.
一个无头幽灵常在城堡出现。
listless
adj.too tired to show interest or do anything倦怠的，没精神的，冷淡的
Reacted to the latest crisis with listless resignation.
对最近的危机所作的.反应是无精打采的放弃
homeless
adj.无家可归的
ex)A kind-hearted old man adopted the homeless child.一个好心的老头收集养了这个无家可归的小孩子。