in AM, use 美国英语用 initialing, initialed
1
[ADJ 形容词]开始的;最初的 You use
initial to describe something that happens at the beginning of a process.
2
[N-COUNT 可数名词](姓名的)首字母(例如 Michael Dennis Stocks 的首字母缩写为 M.D.S.) Initials are the capital letters which begin each word of a name. For example, if your full name is Michael Dennis Stocks, your initials will be M.D.S.
3
[VERB 动词]用姓名的首字母签名于 If someone
initials an official document, they write their initials on it, for example to show that they have seen it or that they accept or agree with it.