形容詞 helpless:

1. lacking in or deprived of strength or power
   同義詞：incapacitated
2. unable to function; without help
   同義詞：lost
3. unable to manage independently

1. The ship was helpless against the power of the storm.
   那船抵擋不住風(fēng)暴的力量。
2. A hideous monster attacked the helpless villagers.
   有個丑惡的怪物襲擊了手無寸鐵的村民。
3. He lay helpless in the street under the pitying gaze of the bystanders.
   他零零地躺在路邊，旁觀的人都投以憐憫的目光。
4. Armed thieves descended on the helpless travelers.
   一群武裝盜賊襲擊了無依無靠的旅客。
5. In a situation of great difficulty or perplexity; helpless.
   處于一個非常困難或迷惑的境地; 無助的
6. In the past, the great powers would wage war against helpless little countries so as to gain their land.
   以前，勢力強(qiáng)大的國家常同弱小無助的國家發(fā)動戰(zhàn)爭以獲得土地。
7. He is as helpless as a baby.
   他像一個嬰兒一樣依賴人。

help.less

adj.（形容詞）
Unable to manage by oneself; incompetent.
不能自立的；無能力的
Lacking power or strength; impotent.
無力的，無能力的：缺乏能力或力量的；衰弱無力的
Impossible to remedy; hopeless.
不可救藥的；沒有希望的
Impossible to control; involuntary:
無法控制的；不由自主的：
例句：
helpless laughter.
身不由己的笑聲

【引伸】
help.lessly
adv.（副詞）
help.lessness
n.（名詞）