cardinal

Of the greatest importance; fundamental or primary in nature.

Forms

plural: cardinals

Examples

Mary considered honesty the cardinal rule of their friendship.
For the project's success, careful planning was a cardinal requirement.
James believed that patience was a cardinal virtue in teaching.

All Words

relish
To enjoy something greatly, often with a sense of eager anticipation.
gambit
a calculated move or opening remark made to gain an advantage, often at some risk
glimpse
a quick, incomplete look at something or someone, often lasting only a moment

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