the.com/louver
Slats that let air gossip through while light keeps its mouth shut.
means A set of angled slats in a door, window, or vent that let air pass through while blocking rain, sun, or direct view.
from From Old French 'lovier' or 'l'ouvert' (roughly 'the opening'), originally naming a roof turret or chimney-like structure on medieval halls that let smoke escape while keeping weather out. The word crossed into English by the 1300s, and over time its meaning drifted downward from rooftop smoke-vents to the slanted slats we now see in shutters, doors, and air ducts — the opening shrank, but the job stayed the same.
- name origin
- From French l'ouvert, meaning the open
- medieval use
- Roof vents let smoke escape castle halls
- angle trick
- Tilted slats block rain, not breeze
- everywhere now
- Speakers, cars, server racks all hide louvers