[ noun ] (anatomy,zoology) a hand with the fingers clenched in the palm (as for hitting)
Used in print(Louis Zara, Dark Rider....)
With incredible ferocity , he brought his fists together and struck .
He was frightened ; his fists clutched so tightly that his knuckles hurt .
He clenched his fists and faced the terror .(Glayds H. Barr, The Master of Geneva....)
On the outskirts of the rabble the Camaret brothers and Gaspard_Favre shook their fists .
Fists pummeled him as he staggered forward .