noun
a small, sharp pointed outgrowth on the skin of an animal or plant
verb
to cause a tingling or mildly painful sensation
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The cactus was covered in small prickles to protect itself from animals.
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Be careful not to touch that plant, it has prickles on it.
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I hate when I accidentally prick myself on those prickly bushes.
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The thought of public speaking always makes me feel like I have prickles on my skin.