peak

The highest point (of something).

“at the peak of the pyramid”

A V shape.

The most extreme possible amount or value.

“voltage peak”

The top or extreme point of something (usually a mountain or hill).

“the view from the peak was magnificent”

A brim that projects to the front to shade the eyes.

The highest level or degree attainable; the highest stage of development.

“the peak of perfection”

“summer was at its peak”

The period of greatest prosperity or productivity.

To reach the highest point; attain maximum intensity, activity.

“That wild, speculative spirit peaked in 1929”