1. to make or become barbarous; to reduce to a state of barbarism or savagery
Usage: chiefly British spelling (American: barbarize); transitive or intransitive
2. to make (language) barbarous or unrefined; to introduce barbarisms into
Usage: chiefly British spelling (American: barbarize); transitive

Examples

• The prolonged conflict threatened to barbarise the entire region.
• Constant exposure to violence can barbarise even the most civilized society.
• Critics argued that the new slang would barbarise the English language.
• War has a tendency to barbarise those who participate in it.
• The invaders did not barbarise the conquered territories as much as historians once believed.
• Excessive commercialism may barbarise our cultural values.