barbarianize

[ bahr-bair-ee-uh-nahyz ]
/ bɑrˈbɛər i əˌnaɪz /

verb (used with object), bar·bar·i·an·ized, bar·bar·i·an·iz·ing.

to make barbarian.
Also especially British, bar·bar·i·an·ise.

Origin of barbarianize

First recorded in 1855–60; barbarian + -ize