irritant
adj
causing irritation; irritating 有刺激性的; 刺激的
a substance that is irritant to sensitive skins 對敏感的皮膚有刺激性的物質. irritant, n
(a) substance that irritates, eg pepper in the nose 刺激物(如嗆到鼻子里的胡椒).
(b) (fig 比喻) thing that annoys 令人煩惱的事物
The noise of traffic is a constant irritant to city dwellers. 車輛的噪音對城市居民是永無止境的騷擾.