This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
I'm certified that there is no such word as "crestling". You may have typed it wrong or so. Maybe you mean cresting (crest).

Cresting (Crest)
(n) peak, summit; top line of a mountain
(v) reach a high point; top out

Sample sentences:
(n) Robert headed to the nearby crest.
(v) The snow crested yesterday evening.