invigilate
verb
in·vig·i·late in-ˈvi-jə-ˌlāt 
invigilated; invigilating
intransitive verb
: to keep watch
especially, British : to supervise students at an examination
transitive verb
: supervise, monitor
invigilation
in-ˌvi-jə-ˈlā-shən
noun invigilator
in-ˈvi-jə-ˌlā-tər
noun 
Did you know?
Watch Out for the Origin of Invigilate
Invigilate is a descendant of the Latin verb vigilare, meaning "to stay awake." As you may have guessed, vigilare is the ancestor of our adjective vigilant ("alertly watchful"), and it also gives us reveille ("a signal to wake up in the morning," via French réveillez) and surveillance ("close watch, supervision," via French surveiller). Invigilate has been a member of the English language since the mid-16th century.
Example Sentences
He was asked to invigilate next week.
Word History
Etymology
Latin invigilatus, past participle of invigilare to stay awake, be watchful, from in- + vigilare to stay awake — more at vigilant
First Known Use
1553, in the meaning defined at intransitive sense