beaver - definition and synonyms

verb 

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/ˈbiːvə(r)/
present tense
I/you/we/theybeaver
he/she/itbeavers
present participlebeavering
past tensebeavered
past participlebeavered

phrasal verb

beaver away

[intransitive]
present tense
I/you/we/theybeaver away
he/she/itbeavers away
present participlebeavering away
past tensebeavered away
past participlebeavered away
informal
if you beaver away at something, you work very hard at it
beaver away at:

He was beavering away at his homework until after midnight.