mutually shirking responsibilities (idiom) / each blaming the other / passing the buck to and fro / each trying to unload responsibilities onto the other
商约
shāng yuē
trade treaty (abbr. for 通商條約|通商条约[tong1shang1 tiao2yue1]) / to mutually agree (to do sth) (abbr. for 商量約定|商量约定[shang1liang5 yue1ding4])
transfer character (one of the Six Methods 六書|六书 / of forming Chinese characters) / character with meanings influenced by other words / sometimes called mutually explanatory character
转注字
zhuǎn zhù zì
transfer character (one of the Six Methods 六書|六书 / of forming Chinese characters) / character with meanings influenced by other words / sometimes called mutually explanatory character