monitor

The word 'monitor' has a direct lineage from Latin, where 'monitor' meant 'one who warns or advises'. This sense of a guiding or warning figure was adopted into English in the 16th century, first referring to a senior pupil who instructed younger ones. The core concept of 'one who watches over to give advice or warning' logically extended in the 19th century to instruments for checking or regulating machinery. In the 20th century, this meaning evolved naturally to name the display screen that 'watches over' and provides continuous visual feedback on a computer's operations.

Structure: monit (warn) + or (agent suffix) 'monit' originates from the Latin verb 'monēre', meaning 'to warn, advise, remind'. The '-or' is a Latin agent noun suffix, indicating a person or thing that performs the action of the verb.