surveille - definition and synonyms

verb [transitive] 

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/sə(r)ˈveɪl/
present tense
I/you/we/theysurveille
he/she/itsurveilles
present participlesurveilling
past tensesurveilled
past participlesurveilled

or surveil 

  1. to watch people or places secretly to find out what they are doing

    You can be surveilled by any number of federal agencies.