NSW Opportunity Class
Pinnacle
noun/pin-uh-kuhl/
the most successful point; the culmination.
In contextWinning the award was the pinnacle of her career.
Remember it
A PIN has a tiny sharp point — the pinnacle is the sharp top point, your highest moment.
Use it well
Use with 'of': the pinnacle of her career, of success — reserve it for peaks of achievement, not small wins.