of the essence

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

of the greatest importance
- the all-important subject of disarmament
- crucial information
- in chess cool nerves are of the essence
• Syn:
all-important, all important, crucial, essential
• Similar to:
important, of import
• Derivationally related forms:
essence (for: essential), essentialness (for: essential), essentiality (for: essential), cruciality (for: crucial)