名詞 initial:

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

動(dòng)詞 initial:

1. mark with one's initials

形容詞 initial:

1. occurring at the beginning

1. The initial `h' in `hour' is not aspirated.
   hour一字中起首的h不發(fā)送氣音。
2. The word `hour' is pronounced without an initial aspirate.
   hour一字的開(kāi)頭字母h不發(fā)送氣音。
3. The government underwrotethe initial costs of the operation.
   政府為該項(xiàng)活動(dòng)提供了開(kāi)辦時(shí)所需的費(fèi)用。
4. The new aircraft has performed very well in its initial trials.
   這種新式飛機(jī)在最初幾次試飛中表現(xiàn)性能良好。
5. After she'd overcome her initial shyness, she became very friendly.
   她克服了開(kāi)始時(shí)的羞澀之后，就變得非常友善。
6. Please write down your initials on each page of the paper.
   請(qǐng)?jiān)诿宽?yè)考卷上寫(xiě)下名字的首字母。

in.i.tial

adj.（形容詞）
Of, relating to, or occurring at the beginning; first:
開(kāi)始的：開(kāi)始的，與開(kāi)始有關(guān)的，發(fā)生在開(kāi)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：一個(gè)單詞的第一個(gè)或前幾個(gè)字母
n.（名詞）

The first letter of a proper name.
專有名詞的第一個(gè)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個(gè)字母：
例句：
stationery monogrammed with her initials.
印有她姓名首字母的信箋

The first letter of a word.
字首：?jiǎn)卧~的第一個(gè)字母
A large, often highly decorated letter set at the beginning of a chapter, verse, or paragraph.
（書(shū)刊、文章中段落、章節(jié)等）特大的大寫(xiě)首字母：一章、一首詩(shī)或一個(gè)段落的第一個(gè)字母，大而且通常極具裝飾性
v.tr.（及物動(dòng)詞）
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.
用姓名的首字母簽名：標(biāo)出或用首字母簽名，尤指用于表示授權(quán)或同意

來(lái)源：
Latin initi3lis
拉丁語(yǔ) initi3lis
from initium [beginning] * see ei-
源自 initium [開(kāi)始] *參見(jiàn) ei-

【引伸】
ini.tially
adv.（副詞）
ini.tialness
n.（名詞）