the.com/tree canopy

means the upper layer of a forest formed by the spreading, interlocking crowns and leaves of trees

from a plain compound of 'tree' plus 'canopy' — and canopy itself traveled a strange road: it comes from Greek 'konopeion,' a bed with netting to keep out gnats ('konops'), through Latin and French as a cloth covering hung over a bed or throne. English later stretched the word upward and outward, from fabric over sleepers to leaves over forests.