IPA: //bɑːˈbɑːbərəsli//
KK: /bɑrˈbɛrəsli/
In a way that is cruel, brutal, or lacking in civilization.
The soldiers acted barbarously during the invasion, showing no mercy to the civilians.
Barbarously → It is formed from "barbarus" (from Latin, meaning foreign or strange) and the suffix "-ly" (meaning in a manner of). The word "barbarously" means in a manner that is foreign or uncivilized, often implying cruelty or savagery.
Think of the word 'barbarus' which means foreign or strange, and remember that 'barbarously' describes actions that are done in a cruel or uncivilized manner.