tarkkailija
Tarkkailija is a Finnish noun meaning an observer, watcher, or monitor. It refers to a person who keeps watch over someone or something, often to gather information, ensure compliance, or maintain situational awareness.
Etymology: The word is formed from the verb tarkkailla (to observe, monitor) with the agent noun suffix
Usage: In everyday language, tarkkailija describes a person who watches a situation, a process, or a person.
Nuances: Tarkkailija implies ongoing attention or vigilance and can carry a neutral or slightly evaluative tone