iris

n. 虹膜，彩虹

IOW, Iowa, IPA, ipso facto, IQ, ir-, IRA, Iran, Iraq, irascibility, irascible, irascibly, irate, irately, IRBM, ire, Ireland, iridescence, iridescent, iridium, Irish, Irish coffee, 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,