IPA: /bɪˈlɛdʒərəntli/
KK: /bɪˈlɛdʒərəntli/
In a way that shows aggression or a willingness to fight.
He spoke belligerently during the argument, making the situation more tense.
Belligerently → It is formed from "bellum" (meaning war) and "-gerent" (from the Latin "gerere", meaning to carry or to wage). The word describes a manner of behaving that is aggressive or warlike, as if one is waging war.
Think of 'war' ('bellum') and 'waging' or 'carrying' it ('gerere') to remember that 'belligerently' means behaving in a warlike or aggressive manner.