"mantener vigilado" in English

to retain in an appendix- to bankroll- to carry on- to cherish- to conduct- to hold- to hold- to hold- to preserve- to provide for- to stand by- to stick by- to stick to- to have- to keep- to maintain- to keep up- to support- to sustain- to uphold

to monitor- to bird-dog- to invigilate- to look after- to scout out- to stand over- to supervise- to surveil- to watch- to guard- to keep watch- to police- to invigilate at- to proctor- to keep watch on- to keep watch on- to patrolto patrol