irrepressible
词根词缀：
irrigate v. 灌溉
ir 向内，进入 + rig 浇水 + ate 做，造成，使… → 让水进入 → 灌溉
irrupt v. 闯入
ir 向内，进入 + rupt 断 → 打断进入 → 闯入
irruption n. 闯入
irrupt的名词
irradiate v. 照射
ir 表加强 + radi 光线，辐射 + ate 做，造成，使… → 照射
irritate v. 激怒；刺激
ir 表加强 + rit 擦 + ate 做，造成，使… → 摩擦 → 激怒
数据来源：新东方英语词汇速记大全
相关例句：
If the politicians do that, the irrepressible optimism of entrepreneurs will be fully unleashed, and genuine rebuilding from the downturn can begin.
如果政治家采取了这种做法，企业家抑制不住的乐观情绪将会得到充分释放，真正的重建才会开始。
Your irresolute attitude, coupled with your irrepressible sense of nonchalance simply is inappropriate to the seriousness of the situation.
你犹豫不决的态度以及抑制不住的冷淡与事态的严重性完全不相称。
I listened to detect a woman's voice in the house, and filled the interim with wild regrets and dismal anticipations, which, at last, spoke audibly in irrepressible sighing and weeping.
我倾听着，想听到屋里有女人的声音，我心里充满了狂乱的悔恨和凄凉的预感，我终于忍不住出声地叹息着，哭了。
Some transactions are so tempting as to be irrepressible, much as we might want to repress them: school children will be supplied with chocolate bars whether or not the school shop stocks them.
我们或许想要压制交易，但一些交易如此诱人，以至于压制力有多大，抵抗力就有多大：无论学校商店是否有巧克力棒存货，学生都会弄到巧克力棒吃。
Or was it his irrepressible sense of humour rising above circumstances?
还是在危险环境中他依然有抑制不信的幽默感？
But the only thing really hot now is the Lakers, who have surprisingly emerged as a legitimate championship contender with a big front line and, of course, the irrepressible Bryant.
但现在唯一真正火的却是湖人队，他们展现出令人惊讶的具有夺冠实力，当然，这少不了无人能挡的科比。