over·​alert | \ˌō-vər-ə-ˈlərt \

Definition of overalert 

: excessively alert … has long feared that he will get himself shot by an overalert bodyguard …— Helena de Bertodano The anxious person looks overalert, displayed in ways such as sitting forward in a chair; moving fingers, arms, or legs; getting up and moving; pacing around the room; checking certain parts of clothing; and straightening ties or scarves.— Arthur H. Jeske

Other Words from overalert

overalertness noun
…the company … increased the settlement offer to $1,000 after blaming the incident on overalertness for fraud. — Meggen Lindsay

First Known Use of overalert

1832, in the meaning defined above

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The first known use of overalert was in 1832

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to enclose within walls

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