(noun) Fast growing function based on Kruskal's tree theorem.
"A man without principle is like a tree without leaves."
"He fell as gently as a tree falls. There was not even any sound."
"In the beauty and grandeur of individual trees, and in number and variety of species, the Sierra forests surpass all others."
"I never saw a discontented tree."
"Moments like this are buds on the tree of life. Flowers of darkness they are."
"From a withered tree, a flower blooms."
"A lion chased me up a tree, and I greatly enjoyed the view from the top."
"Character is like a tree and reputation its shadow. The shadow is what we think it is and the tree is the real thing."
"And all the lives we ever lived and all the lives to be are full of trees and changing leaves."
"God has cared for these trees, saved them from drought, disease, avalanches, and a thousand tempests and floods. But he cannot save them from fool."
"I will not say that your mulberry trees are dead; but I am afraid they're not alive."
"I speak for the trees, for the trees have no tongues."