ventilation
https://gyazo.com/c7e8c44ecf421f850867917736390ad4
source: [廃墟で換気扇が静かに回っているGIF画像｜無料GIF画像検索 GIFMAGAZINE 83084]
noun
1. the provision of fresh air to a room, building, etc.: 部屋、建物などへの新鮮な空気の供給
通風, 換気, 通気; 換気装置.
Medicine the supply of air to the lungs, especially by artificial means.: 特に人工的な手段による、肺への空気の供給
2. public discussion or examination of an opinion, issue, or complaint.: 意見、争点、抗議の公開の議論や説明
自由な論議, 公開討議; (意見･感情などの)表明, 表出
ORIGIN
late Middle English (in the sense ‘current of air’): from Old French, or from Latin ventilatio(n-), from the verb ventilare (see ventilate). ventilation (sense 1) dates from the mid 17th century.