Can, Tin Can
The radical can is the same as the kanji can. Usually when we talk about a can with this kanji we mean a tin can, though.
Picture a tin can in your mind as clearly as you can.
かん
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The reading for a can is かん, which seems impossibly easy. If that isn't close enough for you, picture this: Genghis Khan (かん) is drinking out of a tin can. He glug glug glugs, gasps, and wipes his face. He holds out the can, "Khan made cans," and winks.
かん is can, it's really easy, come on. Just take this one.