INVIGILATE

[in.vig.i.late] vb -lat.ed ; -lat.ing [L invigilatus, pp. of invigilare to stay awake, be watchful, fr. in- + vigilare to stay awake--more at vigilant] vi (1553): to keep watch; esp, Brit: to supervise students at an examination ~ vt: supervise, monitor -- in.vig.i.la.tion n -- in.vig.i.la.tor n