How to Say "surveillance" in Spanish
The Spanish word for “surveillance” is “vigilancia” — B1 level. This is a very common word in everyday Spanish.

Examples
Las cámaras de vigilancia grabaron todo lo que pasó.
The surveillance cameras recorded everything that happened.
El médico puso al paciente bajo estrecha vigilancia.
The doctor put the patient under close monitoring.
La policía aumentó la vigilancia en el barrio después de los robos.
The police increased patrols (or watch) in the neighborhood after the robberies.
Feminine Noun Marker
Remember that 'vigilancia' is always feminine, so you must use 'la' before it: 'la vigilancia' or 'una vigilancia'.
Using the Wrong Part of Speech
Mistake: “Saying 'El guardia hace vigilancia' (The guard does surveillance).”
Correction: Use the related verb: 'El guardia vigila' (The guard watches) or 'El guardia realiza tareas de vigilancia' (The guard carries out surveillance tasks).
Related Translations
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