oppressive 
英 [əˈpresɪv]  美 [əˈprɛsɪv] 
adj. 压迫的；闷热的，难以忍受的；沉重的，压抑的

例句：
The atmosphere became oppressive. 

气氛变得压抑。

The oppressive afternoon heat had quite tired him out. 

下午闷热的天气使他疲惫不堪。

the present oppressive system 

目前的专制体制

The new laws will be just as oppressive as those they replace. 

新法律只会与原来的法律一样苛严。