noun
pinnacle
PIN-uh-kuhl/ˈpɪnəkl/
A high pointed peak.
A narrow pinnacle rises above the surrounding cliffs and valleys.

Etymology
Latin pinna supplied the image of a peak; the diminutive ending did not necessarily imply smallness. A literal mountain top became a figurative summit—the highest level of achievement.
In context
came through and turned one street in one city on one island into one of the most valuable locations on earth. And what we're sitting in right now is the pinnacle of that.
More examples
- Snow covers the mountain's rocky pinnacle.
- The climbers carefully approach the base of the pinnacle.
- Jagged pinnacles cast long shadows across the canyon.
Forms
pinnacle · pinnacles