irreducible

adj. 不能复归的,不能削减的不可约的

ironing, ironing-board, ironmonger, ironmongery, ironstone, ironware, ironwork, ironworks, irony, irradiate, irradicable, irrational, irrationality, irrationally, irreconcilable, irreconcilably, irrecoverable, irrecoverably, irredeemable, irredeemably, irreducibly, irrefutable, irrefutably, irregular, irregularity, irregularly, irrelevance, irrelevancy, irrelevant, irrelevantly, irreligious, irremediable, irremediably, irremovable, irreparable, irreparably, irreplaceable, irrepressible, irrepressibly, irreproachable,