ironwork

n [U] things made of iron, eg gratings, rails, railings 铁制品（如格栅、 铁轨、 栏杆）.

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, ironstone, ironware, ironworks, irony, irradiate, irradicable, irrational, irrationality, irrationally, irreconcilable, irreconcilably, irrecoverable, irrecoverably, irredeemable, irredeemably, irreducible, irreducibly, irrefutable, irrefutably, irregular, irregularity, irregularly,