Genghis KHAN pulls the elephant by the trunk.
This morning, I dried my roof by draping it over the trunk of a tree.
a tree trunk
main ★★☆☆☆ PRE
as a prefix, it means the main (office, manager, road) rather than a branch one
|counter for shops
|PHONE POLE (no roof!)
There's a PHONE POLE in front of my shop,
but my trunk has a ROOF on top.