initial

名词 initial:

1. the first letter of a word (especially a person's name)

动词 initial:

1. mark with one's initials

形容词 initial:

1. occurring at the beginning

1. The initial `h' in `hour' is not aspirated.
   hour一字中起首的h不发送气音。
2. The word `hour' is pronounced without an initial aspirate.
   hour一字的开头字母h不发送气音。
3. The government underwrotethe initial costs of the operation.
   政府为该项活动提供了开办时所需的费用。
4. The new aircraft has performed very well in its initial trials.
   这种新式飞机在最初几次试飞中表现性能良好。
5. After she'd overcome her initial shyness, she became very friendly.
   她克服了开始时的羞涩之后，就变得非常友善。
6. Please write down your initials on each page of the paper.
   请在每页考卷上写下名字的首字母。

in.i.tial

adj.（形容词）
Of, relating to, or occurring at the beginning; first:
开始的：开始的，与开始有关的，发生在开始的；首先的：
例句：
took the initial step toward reconciliation.
采取了走向和解的第一步

Designating the first letter or letters of a word.
首字母的：一个单词的第一个或前几个字母
n.（名词）

The first letter of a proper name.
专有名词的第一个字母
initials The first letter of each word of a person`s complete name considered as a unit:
initials 人名每一部份的第一个字母：
例句：
stationery monogrammed with her initials.
印有她姓名首字母的信笺

The first letter of a word.
字首：单词的第一个字母
A large, often highly decorated letter set at the beginning of a chapter, verse, or paragraph.
（书刊、文章中段落、章节等）特大的大写首字母：一章、一首诗或一个段落的第一个字母，大而且通常极具装饰性
v.tr.（及物动词）
in.i.tialed 也作 in.i.tialled in.i.tial.ing in.i.tial.ling in.i.tials in.i.tials
To mark or sign with initials, especially for purposes of authorization or approval.
用姓名的首字母签名：标出或用首字母签名，尤指用于表示授权或同意

来源：
Latin initi3lis
拉丁语 initi3lis
from initium [beginning] * see ei-
源自 initium [开始] *参见 ei-

【引伸】
ini.tially
adv.（副词）
ini.tialness
n.（名词）