Correct

起初 vs 开始

/ qǐchū vs kāishǐ /
Strokes

Formula

1
2
3
起初(开始)的时候 (in the beginning)
4
起初(开始)的安排 (former/initial arrangement)

Definition

起初 as a Noun, 开始 as a Verb or Noun, which both means [in the beginning; at first; begin; start; beginning].

Example

起初 is a Noun meaning "the beginning stage", often in contrast to 以后 or 现在. 开始 is a verb as well as a Noun. As a Noun, its usage is similar to that of 起初, the two words are interchangeable.
1
chū
起初
  
(
kāishǐ
开始
  
)
duì
法语
gǎn
xìng
兴趣
  
,
hòulái
后来
yīnwèi
因为
gōngzuò
工作
yào
需要
cái
mànmàn
慢慢
de
xué
le
lai
起来
  

He was not interested in French in the beginning, but later he began to pick it up because his work can't do without it.

2
Xiànzài
现在
hòuhuǐ
后悔
le
  
,
chū
起初
  
(
kāishǐ
开始
  
)
zěnme
怎么
tīng
quàn
ne
  
?

Now you regret, why not follow my advice in the beginning?

开始 as the Noun, however, can be modified by an attributive (usually followed by 的), while 起初 cannot.
3
Cóng
xué
学期
de
kāishǐ
开始
  
,
jiù
zhuājǐn
抓紧
shíjiān
时间
  
,
xuéhǎo
学好
mén
chéng
课程
  

At the beginning of this term, he made the best of his time to study all his courses hard.

4
Zài
nián
de
kāishǐ
开始
  
,
men
我们
yīnggāi
应该
yǒu
nián
年度
huà
计划
  

At the beginning of a year, we'd better make a one-year plan.

5
huàn
le
gōngzuò
工作
  
,
zhè
shì
xīn
de
kāishǐ
开始
  
,
yīnggāi
应该
yǒu
xīn
de
miànmào
面貌
  

Since you changed your job, I think it is a new start and you should change you, too.

起初 and 开始 both can modify a Noun.
起初(开始)的时候 (in the beginning) 起初(开始)的安排 (former/initial arrangement)
6
chū
起初
  
(
kāishǐ
开始
  
)
de
shíhou
时候
  
,
huan
喜欢
chī
zhōngguó
中国
cài
  
,
xiànzài
现在
hěn
huan
喜欢
  

At first, he didn't like to eat Chinese food, and now he loves it.

7
men
他们
chū
起初
  
(
kāishǐ
开始
  
)
de
ānpái
安排
shì
lánqiú
篮球
  
,
hòulái
后来
gǎi
chéng
le
yóuyǒng
游泳
  

They started out playing basketball, which was later changed to swimming.

开始 as the Verb, it cannot be replaced by 起初.
8
Hánjià
寒假
jiéshù
结束
le
  
,
xīn
xué
学期
cóng
jīntiān
今天
jiù
kāishǐ
开始
le
  

The winter holidays are over, and today's the beginning of the second semester.

9
kāishǐ
开始
jiù
huan
喜欢
shàng
zhège
这个
fāng
地方
le
  

He liked the place in the very beginning.

10
Rén
lái
le
  
,
men
我们
kāishǐ
开始
zuòtán
座谈
  
!

Since everyone is here, let's start discussing now.

11
Xiànzài
现在
kāishǐ
开始
jiǎng
xīn
  

Today we'll learn a new lesson.