listless

形容词 listless:

1. lacking zest or vivacity
2. marked by low spirits; showing no enthusiasm
   同义词：dispirited

1. I feel dizzy [groggy, listless, sore all over, a bit chilly].
   我头晕[身子软，没有精神，全身酸疼，有一点凉]。
2. 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
3. Because of the death of his mother he is listless all day.
   因为母亲的去世，他整天无精打采的。
4. She was very listless after her illness.
   她病后懒洋洋的。

list.less

adj.（形容词）
Lacking energy or disinclined to exert effort; lethargic:
无精打采的：缺乏精力或不愿努力；迟钝：
例句：
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

来源：
Middle English listles
中古英语 listles
probably from liste [desire] from listen [to desire] * see list 5
可能源自 liste [欲望] 源自 listen [渴望] *参见 list5
-les, -lesse [-less]
-les, -lesse [后缀，表.无，不.]

【引伸】
list.lessly
adv.（副词）
list.lessness
n.（名词）