Webster's Revised Unabridged Dictionary · 1913

Barbarize

Barbarize ({not transcribed}) , intransitive verb

1.
To become barbarous.
The Roman empire was barbarizing rapidly from the time of Trajan. — De Quincey
2.
To adopt a foreign or barbarous mode of speech.
The ill habit... of wretched barbarizing against the Latin and Greek idiom, with their untutored Anglicisms. — Milton

Barbarize ({not transcribed}) , transitive verb

[Compare French barbariser, Late Latin barbarizare.]

To make barbarous.
The hideous changes which have barbarized France. — Burke