We all learn the word “kahakō” meaning “macron,” the bar over the long vowel (as in its own final letter). But it also means “steep, sheer” as in this ʻŌlelo Nōʻeau:
“1527 Ka pali kahakō lele a koa‘e.
Sheer cliff reached only by the tropic bird.
A tall, inaccessible cliff.”