(每日一词）notification

Notification  /ˌnoʊ.t̬ə.fəˈkeɪ.ʃən/ n. 通知（书）；通告；告示

meaning: the act of telling someone officially about something, or a document that does this 

1) 词根：not-知道（notebook, notice)

2) 后缀：-ify 动词后缀；（notify) , -ication 名词后缀

e.g. You must give the bank a written notification if you wish to close your account. 如果你想撤消账户，必须向银行出具一份书面通知。