n a militant organization of Irish nationalists who used terrorism and guerilla warfare in an effort to drive British forces from Northern Ireland and achieve a united independent Ireland
n a retirement plan that allows you to contribute a limited yearly sum toward your retirement; taxes on the interest earned in the account are deferred
n belligerence aroused by a real or supposed wrong (personified as one of the deadly sins)
abbr. 红外天文卫星（Infrared Astronomical Satellite）；远程访问系统（Information Remote Access System）；胰岛素抵抗动脉粥样硬化研究（ Insulin Resistance Atherosclerosis Study）；新加坡国内税务局（Inland Revenue Authority of Singapore）