Englishbeaver
verb
□ beaver away
informal
we spent our spare time beavering away in the garage:
work hard, toil, labour, work one's fingers to the bone, work like a Trojan/dog, work day and night, exert oneself, keep at it, keep one's nose to the grindstone, grind, slave, grub, plough, plod, peg;
informal beaver, plug, put one's back into something, work one's guts out, work one's socks off, knock oneself out, sweat blood, kill oneself;
British, informal graft, fag;
Australian, New Zealand, informal bullock;
British, vulgar slang work one's balls/arse/nuts off;
North American, vulgar slang work one's ass/butt off;
archaic drudge, travail, moil.
▷antonyms take it easy.
beaver (1) Oxford Dictionary of English