及物动词

1. (四肢)拼命乱动,使劲乱摆
If your arms or legs flail or if you flail them about, they wave about in an energetic but uncontrolled way.

2. 连枷(脱粒用的农具)
A flail is a tool which consists of a piece of wood or metal that can swing freely from a handle. Flails are used to beat crops such as corn in order to separate the grain from the rest of the plant.

相关词组：flail around

1. an implement consisting of handle with a free swinging stick at the end
used in manual threshing