hard-and-fast

• 形容规则或原则是固定的、严格的，不可更改或违反的。

Describes rules or principles that are fixed, strict, and cannot be changed or broken.

1. Strictly enforcedB2formal

   Describing rules or regulations that are rigid, unchangeable, and must be followed without exception.

   严格死板的

   • There are no hard-and-fast rules for writing a novel.
   • The company has hard-and-fast deadlines for project submissions.
   • These are hard-and-fast guidelines that cannot be altered.

   同义词fixedimmutableinflexibleironcladrigidsetstrictstringentuncompromisingunyielding

   反义词elasticflexiblelenientloosepermissive