attrib.
1- existing or occurring at the beginning最初的, 开始的：
our initial impression was favourable.
我们最初的印象是好的。
1.1
- (of a letter) at the beginning of a word（字母）位于词首的。
(一般作initials)
- the first letter of a name or word, typically a person's given name or a word forming part of a phrase（尤指姓名、短语中单词的）首字母：
the initials VAT stand for value added tax.
首字母VAT 代表增值税。
(initialled, initialling ; <北美> initialed, initialing) with obj.
1- mark or sign (a document) with one's initials, especially in order to authorize or validate it（尤指为批准或使之生效）用姓名首字母签署（文件）。
1.1
- agree to or ratify (a treaty or contract) by signing it签署（条约, 合同）。
词源
early 16th cent.: from Latin initialis, from initium 'beginning', from inire 'go in', from in- 'into' + ire 'go'.