ironstone

n [U] 1 (also ,ironstone `china) type of hard-wearing white pottery 硬质陶器; 坚质陶器. 2 hard iron ore 铁矿石.

Irish setter (also red setter), Irish stew, Irishman, irk, irksome, iron, iron foundry, iron lung, iron ore, iron rations, iron-grey, iron-mould (US iron-mold), ironclad, ironic, ironical, ironically, ironing, ironing-board, ironmonger, ironmongery, ironware, ironwork, ironworks, irony, irradiate, irradicable, irrational, irrationality, irrationally, irreconcilable, irreconcilably, irrecoverable, irrecoverably, irredeemable, irredeemably, irreducible, irreducibly, irrefutable, irrefutably, irregular,