arm (someone, something, or oneself) with (something)
1. To provide or equip someone, something, or oneself with weapons of some kind. Often used in passive constructions. They are arming the local militia with machine guns and grenades. The peasants were armed with pitchforks and scythes as they stormed the military garrison. It's a pretty cool robot, but why on earth did you arm it with a pair of flamethrowers?
2. To provide someone, something, or oneself with some necessary means of achieving victory. Often used in passive constructions. I try to arm my students with knowledge about how the world really works. We went into the trial armed with surveillance footage that proved the company's involvement in the incident. You don't know how to get there? Well, please tell me you're going to arm yourself with directions at least.
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