Puzzling Question from an Eight year old

How do I explain the word 'rape' to an 8 year old when we have not even discussed what intercourse is? The world/social media has reversed the trend by introducing- 'rape, deflower, intercourse', instead of - intercourse, deflower, rape. One is a natural event and normal, the second can occur between two consenting people depending on the age of the female partner but the third is a crime committed against an unwilling partner!