蹈鞴[tatara] foot-operated bellows
踏鞴を踏む[tatarawofumu] to stumble a step or two forward (when trying to stop)
天津鞴韜[tenshinfukutou] bellows (of the) imperial harbor

鞴韜[fukutou] (pair of) bellows
鞴祭り[fuigomatsuri] Bellows Festival (festival for blacksmiths and foundries on the eighth day of the eleventh month of the lunar calendar, on which they would clean their bellows and pray)