Changed something or made something false in order to trick people or break the law.
From Old French 'falsifier' and Late Latin 'falsificare' (to make false), combining 'falsus' (false) and 'facere' (to make). The meaning has remained consistent since the 1300s—deliberately creating deception.
Enron executives falsified financial records so expertly that auditors missed it for years—a reminder that falsification is a game of conviction, not just numbers. People believe false documents because they're usually 99% true.
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