Meaning of cardinal rule | Babel Free
Definitions
A fundamental rule, upon which other matters hinge.
Examples
“Obviously they were well aware of the cardinal rule of being a college freshman: all's fair in innocent prankage.”
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.