Eager, excited, or intensely interested; in a state of excited anticipation.
Origin uncertain; possibly from Middle French en gogues (in a playful mood) or Dutch gog (fool/play), appearing in English by the 1500s meaning 'astir' or 'in motion.'
The word 'agog' is proof that excitement is contagious—it spread through European languages in slightly different forms because humans experience the same rush of anticipation everywhere, and apparently we needed a fun word for it.
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