beaver

1. a large semiaquatic broad-tailed rodent native to North America and northern Eurasia. It is noted for its habit of gnawing through trees to fell them in order to make dams.
2. a boy aged about 6 or 7 who is an affiliated member of the Scout Association.

1. work hard.

   Bridget beavered away to keep things running smoothly

Old English beofor, befor, of Germanic origin; related to Dutch bever and German Biber, from an Indo-European root meaning ‘brown’.

noun

the lower part of the face guard of a helmet in a suit of armour. The term is also used to refer to the upper part or visor, or to a single movable guard.

late 15th century: from Old French baviere ‘bib’, from baver ‘slaver’.

1. a woman's genitals or pubic area.
2. a bearded man.

early 20th century: of unknown origin.