1. in an uncontrolled or widespread manner; flourishing without restraint

Examples

• Crime was spreading rampantly through the city.
• The disease grew rampantly in the overcrowded conditions.
• Weeds were growing rampantly in the abandoned garden.
• Corruption existed rampantly within the organization.
• The rumor spread rampantly across social media.
• Inflation was rising rampantly during the economic crisis.