verb
invade
in-VAYD/ɪnˈveɪd/
To enter another's territory with hostile forces.
The hostile intruder invades the home through its broken door.

Etymology
The pieces express “go into,” but the Latin compound already included entering violently or as an enemy. The selected English meaning carries that hostile force, not merely movement into a place.
In context
When foreign microbes invade us, the immune system triggers a series of responses
More examples
- Enemy troops invaded the island before dawn.
- The government fears that foreign forces will invade.
- The invading army meets fierce resistance at the border.
Forms
invade · invades · invaded · invading
invasion noun — An armed entry into another territory.
invader noun — A soldier who enters territory to attack.