firmrule

noun
UK /ˈfɜːm ruːl/
US /ˈfɝːm ruːl/

A firmrule is a rule that is very strict and must always be followed.

The teacher made a firmrule that no one could run in the hallway.


OTHER MEANINGS

2. A rule that does not change, even when things get difficult.

The firmrule about bedtime stayed the same all year.

3. A strong and steady way of leading or managing people.

The coach's firmrule helped the team win.

4. A rule that is clear and easy to understand, with no exceptions.

There was a firmrule against sharing answers on the test.