Chinese

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white; empty; blank
white; empty; blank; bright; clear; plain; pure; gratuitous
 
main part of something; to manage; to work
main part of something; to manage; to work; to do; capable; tree trunk; to kill (slang)
 
trad. (白幹)
simp. (白干*)

Pronunciation

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Verb

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白幹

  1. to do something in vain; to do something for nothing; to do something for free