surveillance
sur-(over) + veiller(watch) + -ance
https://gyazo.com/2e569fded3f2747563e5b96dff77d09d
source: Amazon | 1984 | George Orwell | Political
noun
close observation, especially of a suspected spy or criminal: 厳重な監視。特にスパイや犯罪を疑われているもの。
e.g. he found himself put under surveillance by military intelligence. : 彼は自分が軍事情報部による監視下に置かれていることがわかった。
ORIGIN
early 19th century: from French, from sur- ‘over’ + veiller ‘watch’ (from Latin vigilare ‘keep watch’).