NSW Opportunity Class
Zenith
noun/zee-nith/
the time at which something is most powerful or successful.
In contextHis career reached its zenith with that groundbreaking discovery.
Remember it
Zenith is the highest point—picture the sun at its peak; a career's zenith is its most successful moment.
Use it well
Formal; 'reached its zenith', 'at the zenith of'. The opposite is 'nadir' (lowest point).