Chinese edit

Etymology 1 edit

For pronunciation and definitions of – see 白乾 (“without any reason or cause; groundlessly”).
(This term is the simplified form of 白乾).
Notes:

Etymology 2 edit

For pronunciation and definitions of – see 白幹 (“to do something in vain; to do something for nothing; to do something for free”).
(This term is the simplified form of 白幹).
Notes: