noxious

1. ADJ A noxious gas or substance is poisonous or very harmful. 有毒的; 有害的[usu ADJ n]

Many household products give off noxious fumes. 很多家用産品散發有害氣躰。

2. ADJ If you refer to someone or something as noxious, you mean that they are extremely unpleasant. 令人厭惡的[正式] [usu ADJ n]

...the heavy, noxious smell of burning sugar, butter, fats, and flour. ...糖、黃油、油脂和麪粉濃烈難聞的焦糊氣味。

Their behaviour was noxious. 他們的行爲令人生厭。