crestingгерундий или причастие настоящего времени Used attributively to describe something in the act of forming a crest or reaching its highest point.
Синонимы
topping out
reaching a peak
crestгерундий или причастие настоящего времени Used attributively, especially of waves or other moving things that are curling or foaming at the top (e.g., "cresting waves").