noun / verb
crest
KREST/krest/
The uppermost ridge or projecting top of something.
White foam crowns the crest of the curling ocean wave.

Etymology
Latin crista named a tuft or plume, including a cock’s crest or a helmet’s upright ornament. This prominent topmost feature supplied the image for the highest part of a hill or other object.
In context
we have this broad, curved edge we call the iliac crest.
More examples
- The hikers crest the hill and see the valley below.
- The river usually crests in early spring.
- The cockatoo raises the crest on its head.
Forms
crest · crests · crested · cresting
crested adjective — Having a raised ridge or tuft.