louvred

/ˈluːvərd/
adjective
  1. Having a set of angled slats or fins, typically used to allow air or light to pass through while keeping out rain or direct sunlight.
    • The old lighthouse had louvred vents at the top to release heat.
    • The louvred windows let in a gentle breeze without letting in the rain.
    • We installed louvred doors on the closet to improve air circulation.
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