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speculator

/ˈspɛkjʊˌleɪtə/ noun

Latin root: speculātor Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about speculator at Wordnik → Where our words come from →

  1. Someone who makes conjectures without knowing the facts.
  2. Someone who risks losses for the possibility of considerable gains.

Origin

From Latin speculātor (“spy, explorer, investigator”), from speculor (“to watch, to observe”) + -tor (“-er: forming agent nouns”), from specula (“watchtower”), from speciō (“to watch, to observe”), q.v. In some senses, an agent noun formed within English from speculate. Doublet of spectator.

From Wiktionary, via Kaikki.org (CC BY-SA)