1. to remove or extract (a person, especially a spy or operative) secretly from a place, typically a hostile or dangerous location
Usage: military/intelligence context; often used in espionage or covert operations
2. to cause (a liquid or substance) to seep or flow out gradually through a porous material or membrane
Usage: technical/scientific context; less common than the military sense

Examples

• The intelligence agency worked to exfiltrates the undercover agent before his cover was blown.
• Special forces teams were deployed to exfiltrates the diplomats from the conflict zone.
• The operation successfully exfiltrates three operatives across the border.
• Water exfiltrates through the soil layers at a slow rate.
• Engineers designed the system to exfiltrates contaminants from the groundwater.
• The team had to exfiltrates their asset within 48 hours.
• Pollutants exfiltrates from the landfill into the surrounding environment.