N-, mag-/si-, ma-, magsi-
(For a rooster) to move its wings downward as a sign that it is anxious to fight; to position roosters in front of each other to see if they are anxious to fight. (For a person) to pull his shoulders back (as a proud person, as when stretching, as when signaling that he is not afraid to fight).
The ma-/magsi- prefixes are used for the latter definition.
That rooster is moving its wings downward (as a sign that he wants to fight).
When there are roosters fighting in the court, don't put your rooster out to see if he'll fight.