noun, feminine/ʒi.ʁwɛt/plural: girouettes
weathercock, weather vane; a fickle person
“Le jour commençait à paraître. Emma, de loin, reconnut la maison de son amant, dont les deux girouettes à queue-d'aronde se découpaient en noir sur le crépuscule pâle.”
From Middle French gyrouete, from Old Northern French wirewite (“weathercock, weather vane”), borrowed from Old Norse veðrviti (“weather indicator, weather vane”), from veðr (“weather”), and viti (“indicator”). Also attributed to Norman wirewire (a variant of wirewite) at the origin of the dialectal term verguillon for girouette.