Intruder
/ɪnˈtruːdər/noun
A person who enters a place without permission.
Did you know?Intruder comes from Latin intrudere, meaning “to thrust in,” built from in- (“into”) + trudere (“to push”), so the word began as a physical shove before becoming a social violation.
Etymological Timeline
Proto-Indo-European
PIE
*treud-
“to press, thrust, push”
Latin
Latin
trudere
“to thrust, push”
Latin
Latin
intrudere
“to thrust in, force in”
Old French
OF
intruder
“to thrust in, intrude”
Middle English
English
intruden
“to thrust in; enter unlawfully”
Modern English
English
intruder
“a person who enters without permission”