1. reaching or forming the highest point or peak of something
Usage: present participle of pinnacle

Examples

• The mountain range was pinnacling against the sunset sky.
• Her career was pinnacling with the award nomination.
• The tower was pinnacling above all other buildings in the city.
• The athlete’s performance was pinnacling at just the right moment.
• The Gothic cathedral’s spires were pinnacling toward heaven.
• His artistic achievements were pinnacling after years of practice.