Indefeasibility
n. 難使無效, 難廢棄\\n[法] 難以廢止, 不能廢除
??? 情景例句
Their after-sales service was just so bad that I decided to never buy anything from that shop again.
他們的售后服務太差了，所以我決定從此不再能家商店買東西。
Thank you very much. Here's $10.00. Give me $1.00 back, please.
太謝謝你了。這是10美元，找我1美元就行了。
OK.
好吧。