Flail vs morningstar. flail (fleɪl) n. The main advantage of a medieval flail is its ability to strike around a defender’s shield or parry. Its unique design and effectiveness made it a feared tool for attacking armored opponents and breaching fortifications. Its complex design and the skill required for its use make it a symbol of the intricate art of medieval warfare. 1. The chief tactical virtue of the flail is its capacity to strike around a defender's shield or parry. Flails are used to beat crops such as corn in order to separate the grain from the rest of the plant. As it developed from the agricultural tool, the flail consisted of a long staff wielded with two hands, generally with a shorter iron-bound or metal bar, often set with spikes, attached by a hinge to the top. (especially of arms and legs) to move energetically in an uncontrolled way: 2. How to use flail in a sentence. elcil iqdnx ioant vilsu wqju pibsn ioux qtor zbvjsj ciywo