Peak
An axe is sticking in the ground on top of a mountain. It's sticking into the very peak. Because why would you bother to stick your axe anywhere else on the mountain to prove you climbed it?
Picture that axe, jammed into the mountain's peak. The person who did that must have been really cool to get all the way up there.
がく
たけ
None
You can't help but gawk (がく) at the peak. Somehow it looks even higher now.
Go ahead, imagine this peak with an axe in it and actually gawk a bit at how far you have to go to get that high.