annoy: implies a wearing on the nerves by persistent and often petty unpleasantness: his constant complaining ~s us.  

vex: implies greater provocation and stronger disturbance and usually connotes anger but sometimes perplexity or anxiety: a problem that ~es cancer researchers.


irk: stresses difficulty in enduring and resulting weariness or impatience: his chronic tardiness ~s his colleagues.   wear厌倦表示疲倦到难以忍受，如let us not grow weary of doing good让我们做好的事情，不要厌倦  wear本意是打磨磨损，引申出来两个引申义 1、疲劳 2、厌倦，两个引申义都表示"难以忍受的..."


bother: suggests bewildering or upsetting interference with comfort or peace of mind: that discrepancy ~s me.   （upset使烦恼心烦意乱implies the disturbance of normal or habitual functioning of by disappointment, distress, or grief，如constantly bickering that greatly upsets their son不停争吵，令儿子心烦意乱）   


annoy烦心: 指令人不快的琐事打磨人的神经，vex烦恼: 指更严重地冒犯搅扰，使人生气或困惑，irk厌烦: 强调难以忍受，使人不耐烦，bother困扰: 表示扰乱内心的舒适与平静，使人困惑或心烦意乱


记忆方法: 1）首字母AVIB把最后B换成D，想成avid热切的<==厌烦       "烦"是会意字，从页从火，"页"表示和"头部"有关，"火"表示"发烧"，本义是"苦闷急躁"，字面意思是"头痛发烧"，如烦躁烦恼烦闷烦心。引申为"又多又乱"，如不厌其烦心烦意乱麻烦，通"繁"。还用作敬词，如烦请烦劳烦托麻烦    "恼"表示"烦闷苦闷"，<增韵>: "事物挠心也"，如烦恼苦恼懊恼

         2）厌烦的意思是使人烦恼不定mean to upset a person's composure.   (composure平静冷静implies great controlling of emotional or mental agitation by an effort of will or as a matter of habit表示能控制情绪不激动，如maintained his composure even under hostile questioning面对恶意提问，他保持了平静）