Correct

劲头儿

/ jìntóur /
Strokes

Example

As a Noun

strength; energy

1
jìn
起劲
tóur  
头儿

gather one's energies; sum up one's energy (for a task/to do sth)

As a Noun

vigour; spirit; zeal; drive; enthusiasm

2
gōngzuò
工作
de
jìntóur  
劲头儿
hěn
  

He is working with extraordinary vigour and valour.

3
jìntóur  
劲头儿
shí
十足
jiǎng
le
de
xiǎng
想法
  

He presented his ideas with a great deal of vigour/enthusiasm.

4
Gōngzuò
工作
méijìn
没劲
tóur  
头儿

show no zeal for one's work

5
Gǎn
chuǎng
gǎn
shì
de
jìntóur  
劲头儿

vigour of daring to blaze a new trial and make experiments

As a Noun

attitude; expression; look