surveillance
‘close observation of a person or group, especially one under suspicion’
Lexical development traced from the Tamil root:
F. surveillance ‘oversight, supervision, a watch’ < surveiller ‘oversee, watch’ < sur- ‘over’ < O.F. sour-, sor-, sur- < Lat. super ‘above, over’ + veiller ‘to watch’ < suh < uper < Tamil uppu