Correct

靠头儿

/ kào tóur / 
Strokes

Example

As a Noun

sth/sb to rely on

1
Tā
他
méiyǒu
没有
shénme
什么
kào
靠
tóur  
头儿
  
。

He has no one to rely on.

2
Ér  
儿子
zizhǎo
找到
dàogōng
工作
zuò
后
  
,
hòu  lǎo
老两口
liǎng
的
kǒude
生活
shēng
才
huó
有
cái
了
yǒu
靠
lekào
头儿
  
。

Only after their son had found a job were the old couple assured of an adequate livelihood.