beaver

1 beaver /ˈbiːvɚ/ noun
plural beaver or beavers
1 beaver
/ˈbiːvɚ/
noun
plural beaver or beavers
Britannica Dictionary definition of BEAVER
1 
[count] : a small animal that has thick, brown fur and a wide, flat tail, that cuts down trees with its teeth, and that builds dams and underwater houses with mud and branches — often used before another noun
— see picture at rodent
2 
[noncount] : the fur of a beaver — often used before another noun — see also eager beaver
2 beaver /ˈbiːvɚ/ verb
beavers; beavered; beavering
2 beaver
/ˈbiːvɚ/
verb
beavers; beavered; beavering
Britannica Dictionary definition of BEAVER

beaver away

[phrasal verb] informal
: to work in a very active and energetic way — often + at