louver

/ˈluːvə/

Etymology

Inherited from Middle English lover, from Old French lovier, lover (“skylight”), from Medieval Latin *lōdārium (attested as lōvārium), extension of lōdium, of unclear origin, but probably of Germanic origin and related to Frankish *laubijā (“shelter”).

louver means A type of turret on the roof of certain medieval buildings designed to allow ventilation or the admission of light. Lexicurio rates it Rare gem — a strength score of 83 out of 100.

louver is pronounced /ˈluːvə/.

noun

A type of turret on the roof of certain medieval buildings designed to allow ventilation or the admission of light.“But darknesse dred and daily night did hover / Through all the inner parts, wherein they dwelt; / Ne lightned was with window, nor with lover, / But with continuall candle-light […].”
A series of sloping overlapping slats or boards which admit air and light but exclude rain etc.
Any of a system of slits, as in the hood of an automobile, for ventilation.