Defease
vt. 使作废，废除(合同、契约等)：
🗣️ 情景例句
You know something?
知道吗？
This offer remains open until 10th February, beyond which date the terms and prices should be negotiated anew.
此盘有效期至2月10日，超过此期限条件及价格需重新协商。
Thanks very much!
太感谢你了！