Credentials
来自Big Physics
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late Middle English: from medieval Latin credentialis, from credentia (see credence). The original use was as an adjective in the sense ‘giving credence to, recommending’, frequently in credential letters or papers, hence credentials (mid 17th century).
etymonline
credentials (n.)
"letters entitling the bearer to certain credit or confidence," 1670s, from Medieval Latin credentialis, from credentia "belief," from Latin credere "to believe, trust" (see credo). Probably immediately as a shortening of letters credential (1520s, with French word order); earlier was letter of credence (mid-14c.). Especially in reference to the letters of authorization given by a government to an ambassador.
