why
US /waɪ/
UK /waɪ/

1.
为什么
for what reason or purpose
:
•
Why did you do that?
你为什么那样做?
•
I don't understand why he left.
我不明白他为什么离开。
1.
原因, 理由
the reason or explanation for something
:
•
That's why I'm here.
那就是我为什么在这里的原因。
•
The police are investigating the why and how of the incident.
警方正在调查事件的原因和经过。
1.
哎呀, 哦
used to express mild surprise, indignation, or protest
:
•
Why, that's a brilliant idea!
哎呀,真是个好主意!
•
Why, I never thought of that!
哎呀,我从没想过那个!