tuyere
A nozzle or similar fixture through which the blast is delivered to the interior of a blast furnace, or to the fire of a forge
Remains of a clay tuyere are present through which the blast was conducted into the furnace.
Where it comes from
From French tuyère, from Middle French tuyere, from Old French toiere (“pipe-hole”), from tuyau, tueil, tudel (“pipe”), from Frankish *thūta (“pipe”), from Proto-Germanic *þeutǭ (“pipe, channel, flow”), from *þeutaną (“to howl, roar, resound”), from Proto-Indo-European *tu-, *tutu- (“bird-cry, shriek”). Cognate with Old Saxon theuta (“pipe, water-channel”), Old High German watardioza (“water-opening”), Old English þēote (“pipe, channel”), Icelandic þjótandi (“the name of an artery”), Icelandic þjóta (“to rush, whistle”).
Adapted from the Wiktionary entry tuyere (CC BY-SA 4.0).