Invade (verb)

1. Enter another country or territory with military force in order to conquer or gain control.
2. Enter (a place) in large numbers, typically in order to conquer or occupy it.
3. Intrude on (someone's privacy or space).

Origin:

Late 16th century: from latin invadere, from in- 'into' + vadere 'go'.

Examples:

1. The army invaded the enemy territory.
2. The country was invaded by the neighboring state.
3. The protesters invaded the government building.
4. Her privacy was invaded by the paparazzi.
5. The virus invaded his body, causing him to fall ill.