ELI5: Explain Like I'm 5

Celt

A celt is a fancy word for a special kind of tool that was used a long, long time ago by people who didn't have machines like we do today. It's kind of like a big, heavy rock that has been shaped so that one end is flat and sharp. People would use it to chop and shape wood or other materials. Think of it like a big, heavy axe that was made a very long time ago!
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