This is the 5102nd most frequent Portuguese word.
monitor
Monitor: A person who supervises or guides others; a device for displaying information.
Used to refer to a physical display device for a computer.
O monitor do computador está falhando.
The computer monitor is malfunctioning.
Used to describe a tutor or assistant in an educational setting overseeing a group.
Ela é monitora da turma de história na universidade.
She is the monitor of the history class at the university.
Used as a verb meaning to oversee or keep track of an activity.