cowl
noun /kaʊl/
/kaʊl/
- a large loose piece of cloth that covers the head, worn especially by monks
（尤指修道士戴的）大兜帽，大风帽 - a cover for a chimney, etc., usually made of metal. Cowls often turn with the wind and are designed to improve the flow of air or smoke.
烟囱罩，通风帽（常可随风转动以利通风或排烟）
词源Old English cugele, cūle, from ecclesiastical Latin cuculla, from Latin cucullus ‘hood of a cloak’.