空
穴
来
风
未
必
无
因
k
ò
n
g
x
u
é
l
á
i
f
ē
n
g
w
è
i
b
ì
w
ú
y
ī
n
Definitions
1. wind does not come from an empty cave without reason
2. there's no smoke without fire (idiom)
Components
未必
wèi bì
–
not necessarily
无
wú
–
not to have
因
yīn
–
cause