副词

形容词

1. 快速地
If you move headlong in a particular direction, you move there very quickly.

2. 头朝下地
If you fall or move headlong, you fall or move with your head furthest forward.

3. 莽撞地;轻率地
If you rush headlong into something, you do it quickly without thinking carefully about it.

1. with the head foremost

e.g. a headfirst plunge down the stairs
a headlong dive into the pool

Synonym: headfirst

2. excessively quick

e.g. made a hasty exit
a headlong rush to sell

Synonym: hasty