A person who secretly watches and examines the actions of other individuals or organizations and gathers information on them (usually to gain an advantage).
From Middle English spien, aphetic variant of earlier espien, from Old French espier ("to spy"), from Frankish *spehōn ("to spy"), from Proto-Germanic *spehōną ("to see, look"), from Proto-Indo-European *speḱ- ("to look"). Akin to German spähen ("to spy"), Dutch spieden ("to spy").
The noun displaced native , which was also the word for "mirror." In this sense, the verb displaced , which was also the word for "to watch" and became the Modern English word show.
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