IPA: /ˈoʊvərˌstɔːri/
KK: /ˈoʊvərˌstɔri/
The top layer of leaves and branches in a forest that forms a canopy above the ground.
The overstory of the forest is home to many birds and insects.
Overstory → It is formed from "over-" (meaning above) and "story" (from Old French *estorie*, meaning a layer or level). The word "overstory" refers to the upper layer of a forest, above the understory.
Think of something that is 'above' ('over-') a 'layer' ('story') — that's why overstory means the upper layer of a forest.