一筆勾銷

to write off at one stroke

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

pen / pencil / writing brush / to write or compose / the strokes of Chinese characters / classifier for sums of money, deals / CL:支[zhi1],枝[zhi1]

surname Gou

to attract / to arouse / to tick / to strike out / to delineate / to collude / variant of 鉤|钩[gou1], hook

see 勾當|勾当[gou4 dang4]

to write off / to cancel

to melt (metal) / to cancel or annul / to sell / to spend / to fasten with a bolt / bolt or pin