1.grumpy adj. 性情乖戾的, 脾气暴躁的

例句：

Don't worry about his grumpy expression, his bark is worse than his bit.
不要担心他的语言粗暴, 他说话严厉, 但并无恶意。

2.paranoid n. (=paranoiac)患妄想狂者 adj. 类似妄想狂的, 多疑的

例句：

My father locks every door in the house as he is paranoid about being robbed.
我父亲患有妄想狂, 常感到家里会失窃, 所以总是把每扇门都锁上。

3.frenzy ['frenzi] n. 狂暴, 狂怒

例句：

The people were whipped up into a frenzy by the speaker.
人们听了演说人的话群情激奋.

4.pimple ['pimpl] n. 丘疹, 面泡, 疙瘩

例句：

The pimple came to a head before bursting.
丘疹长成脓包後才破裂.