vt.

1. 使減速；妨礙；阻止
   The heavy rain retarded our progress.

   大雨妨礙了我們的進展。

2. 推遲，延遲
   Her death was retarded by five years because of good treatment.

   由於良好的治療，她多活了五年。

3. 【機】使（點火）延遲

vi.

1. 減慢；受到阻滯

n.

1. 減速；阻滯；延遲
2. 弱智

v.

n.