set in concrete
成語所屬單字concrete
set in concrete — 慣用語
1. completely fixed and impossible to change — used about rules, plans, or decision
1.慣用語
釋義
已成定局；無法改變
completely fixed and impossible to change — used about rules, plans, or decisions that are no longer open to discussion.
例句
The company's budget is not set in concrete yet, so we can still ask for more money.
Marta thought the holiday dates were set in concrete, but her boss agreed to change them.