defenseless (US) adjective
or British defenceless /dɪˈfɛnsləs/ defenseless (US)
adjective
or British defenceless /dɪˈfɛnsləs/ Learner's definition of DEFENSELESS
[more defenseless; most defenseless]
: not able to defend yourself, your country, etc.无防御能力的;不能自卫的;无助的 -
Without weapons of any kind, the people of the town were completely defenseless.没有任何武器,这个镇的居民根本无法自卫。
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Don't hurt them. They're just poor, defenseless [=helpless] animals.不要伤害它们。它们只是些可怜无助的动物。
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often + against