belligerent
adjective /bəˈlɪdʒərənt/
  /bəˈlɪdʒərənt/
 - aggressive and unfriendly synonym hostile- a belligerent attitude
- He is always very belligerent towards me.
 
- [only before noun] (formal) (of a country) fighting a war- the belligerent countries/states/nations
 
Word Originlate 16th cent.: from Latin belligerant- ‘waging war’, from the verb belligerare, from bellum ‘war’.