to turn bacteria, poisonous chemicals, etc. into weapons that could kill or injure many people

to make it possible to use something to attack a person or group

They claimed that the security agency had weaponized the internet. 他们声称安全机构将互联网用作武器。

He hoped to weaponize the issue of healthcare as part of his election campaign. 他希望把医疗问题用作武器，作为他竞选活动的一部分。