As a verb:
* The injured bird flailed its wings helplessly on the ground.
* The drowning man flailed his arms in the water, desperate for help.
* The boxer flailed wildly, but his punches were easily dodged.
* After the car crash, she flailed around in shock, unable to get out of the wreckage.
As a noun:
* The farmer used a flail to thresh the wheat. (A traditional tool)
* The flail of his arms was a comical sight to behold. (Meaning a wild swinging motion)
* The flail of his emotions was difficult to control after the news. (Meaning a sudden, uncontrolled outburst)
Figurative language:
* His words flailed about, desperate to make a point but hitting nothing but empty air.
* The economy flailed under the weight of the pandemic.
Remember that the meaning of "flail" can change depending on the context. Pay attention to the surrounding words and phrases to understand the intended meaning.