pugn is an irregular verb, meaning to be aggresive or to want to become aggresive. The verb goes as follows:
they pougnen ( pronounced POO-GE-NEN)
however, when used it the past tense, it becomes regular:
I did pugn
you were pugning
I hit my sister, I saw her pugnaciousnessicless
I want to pugn, but I must restrain myself.