in·vig·i·late 
/ɪnˈvɪʤəˌleɪt/ verb
in·vig·i·lates; in·vig·i·lat·ed; in·vig·i·lat·ing /ɪnˈvɪʤəˌleɪt/ verb Brit : to watch students who are taking an examination : proctor [+ obj] ▪ invigilate an exam [no obj] ▪ He was asked to invigilate next week.
— in·vig·i·la·tor /ɪnˈvɪʤəˌleɪtɚ/ noun, plural in·vig·i·la·tors [count]
/ɪnˈvɪʤəˌleɪtɚ/ noun, plural in·vig·i·la·tors [count]
