Correct

缘由

/ yuányóu / 
Strokes

Definition

reason/cause

Example

As a Noun

cause and reason

1
Wúyuán
无缘
yóu
由
de
的
kǒngjù
恐惧

unreasoning fear

2
Wúyuán
无缘
yóu
由
dì
地
fāhuǒ
发火

fall into a rage for no reason/over nothing/without rhyme or reason