New HSK word(s):

4 Old HSK word(s): A VS 白 * → bai2 white/ blank B Adv 白 * → bai2 for nothing D 免费 * → mian3 fei4 free for charge D VS 无偿 * → wu2chang2 volunteer

无偿

Grade E word(s):

空余 [kong4 yu2]

gratis
免费地 [mian3 fei4 de5]

gratis

Gb	Eng	Viet