[Mr Twisty]

2nd Amendment: "A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed."

Let's break it down...
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reg·u·late

To put or maintain in order
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mi·li·tia

An army composed of ordinary citizens rather than professional soldiers.
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se·cu·ri·ty

Freedom from risk or danger
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free

Not subject to arbitrary interference by a government
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state

One of the more or less internally autonomous territorial and political units composing a federation under a sovereign government
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right

Fitting, proper, or appropriate
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peo·ple

The mass of ordinary persons; the populace
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keep

To retain possession of
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bear

To apply maximum effort and concentration
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arm

A weapon, especially a firearm
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in·fringed

invalidated
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To put or maintain in order an army composed of ordinary citizens, rather than professional soldiers, not subject to arbitrary interference by a government, being necessary to the security of the internally autonomous territories, the right of the mass of ordinary persons, To retain possession of and to apply maximum effort and concentration of a weapon, especially a firearm SHALL NOT BE invalidated.