| beaver | (noun) large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges | - |
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| (noun) a hat made with the fur of a beaver (or similar material) | Synonyms: castor |
| (noun) a movable piece of armor on a medieval helmet used to protect the lower face | - |
| (noun) a man's hat with a tall crown; usually covered with silk or with beaver fur | Synonyms: dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper |
| (noun) a full beard | - |
| (noun) the soft brown fur of the beaver | Synonyms: beaver fur |
| (verb) work hard on something | Synonyms: beaver away |