1. to make barbarous or uncivilized; to reduce to a state of barbarism
Usage: British spelling (American: barbarizes); third person singular present tense
2. to make or become crude, harsh, or unrefined in language or behavior
Usage: British spelling (American: barbarizes)

Examples

• The prolonged conflict barbarises the soldiers who fight in it.
• Constant exposure to violence barbarises even the most gentle individuals.
• Some argue that certain media barbarises public discourse.
• The invading forces barbarised the conquered territories.
• War barbarises society and erodes moral standards.