查询结果:

vt. 使加快,使增速 
vi. 加快,增速  

拆分: ac-加强意义 + -celer-快,速 + -ate动词词尾  

例:
vt.
accelerated cement 快凝水泥 
The car suddenly accelerated. 汽车突然加速。 
Our country should accelerate the economic growth. 我国应加快经济增长。 
vi.
The bus accelerated. 公共汽车加速了。 
The AIDS epidemic is accelerating dramatically. 艾滋病正以惊人的速度曼延。