refuse 和 reject 和 decline 和 turn down 的差別在哪裡？

 

Refuse is when someone offers you something.
Reject is this or when you disagree with an idea (e.g. ideology, dissent).
Decline is when you refuse an offer e.g. of work, or a proposal of any kind.
Turn down is to decline.

"He refused to take the money"
"She rejected the idea"
"I declined the proposal"
"I had to turn down the offer"