Covered with, or wearing, a beaver or hat.(adjective)
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Use "beavered" in a sentence
"My hibernation sarcophagus is made of gopher wood with a tastefully "beavered" finish"
"He is a most industrious small chopper, and the other day gnawed down, or as the children call it, "beavered" down, a misshapen tulip tree, which was about fifty feet high."
"He beavered away for another fifteen minutes, but was only able to clear an area less than a yard square."