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Definition of overspeak in English:
overspeak
verb
US1with object To overstate or exaggerate; to make exaggerated claims for.
2no object To speak too strongly, to exaggerate; to speak too much. Also with object (refl.).
Origin
Early 17th century; earliest use found in Thomas Coryate (?1577–1617), traveller and writer. From over- + speak.
