Definition of belligerent adjective from the Oxford Advanced American Dictionary
belligerent
adjective
/bəˈlɪdʒərənt/
1unfriendly and aggressivesynonymhostilea belligerent attitudeHe is always very belligerent toward me.2[only before noun] (formal) (of a country) fighting a warthe belligerent countries/states/nationsbelligerence