[mass noun]the state of feeling annoyed, impatient, or angry 恼怒;不耐烦;生气 ■[count noun]a cause of this 刺激物;恼人的事;烦心事 the minor irritations of life. 生活中琐碎的烦心事。 ■the production of inflammation or other discomfort in a bodily part or organ 发炎;疼痛;不适 ■(Biology)the stimulation of an organism, cell, or organ to produce an active response (生)刺激(作用),兴奋
语源
late Middle English: from Latin irritatio(n-), from the verb irritare (see irritate)