intruder

someone who enters a place without permission ผู้บุกรุก

As the intruders closed in on the base, explosives planted by the marines went off, killing and wounding some of them.

Clean Slate is financing research to explore how to design computer systems that are less vulnerable to computer intruders and recover more readily once security is breached.

She heard four gunshots, then the intruder left after stealing the items.