denaturalize or denaturalise /dē-nachˈə-rə-līz/

1. To make unnatural
2. To deprive of naturalization as a citizen

dēnaturalīzāˈtion or dēnaturalīsāˈtion noun

• silkworms
• silky
• silky oak
• silky oaks
• sill
• sillabub
• sillabubs
• silladar
• silladars
• siller
• sillers
• Sillery
• sillier
• sillies
• silliest
• sillily
• sillimanite
• sillimanites
• silliness
• sillinesses
• sillock
• sillocks
• sills
• silly
• silly-billies