the.com/leaflet

means A small printed sheet or booklet, usually free and usually trying to sell you, save you, or inform you of something in a hurry.

from Simply 'leaf' (a page, as in a book's leaf) plus the diminutive suffix '-let,' meaning a small leaf — the same pattern as 'booklet' or 'piglet.' The word 'leaf' itself traces back to Old English 'leaf,' related to German 'Laub' and Dutch 'loof,' all rooted in the plant-leaf sense — the metaphor of a page as a leaf of a tree is ancient and widespread. 'Leaflet' as a printed handout is a 19th-century coinage, arriving once mass printing made it cheap enough to hand a single leaf to anyone who'd take one.