Englishfor English speakers
arm
Noun
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One of the upper limbs people have; arms start at the shoulder and go down to the wrist, sometimes the hand is included.
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A weapon.
arm
Verb
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To give or sell weapons to a person, group, or country.
Our taxes pay to arm the military.
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To get a tool or a weapon ready for action; to activate.
Remember to arm the alarm system.
tool
Noun
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A tool is an object that you use to do a specific job, such as a hammer.
I used to fix my own car, but I sold all my tools.
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A tool is a person being used by another person or organization.
He is such a tool. He should think for himself, instead of doing everything they tell him to do.