Credibility

google

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mid 16th century: from medieval Latin credibilitas, from Latin credibilis (see credible).

wiktionary

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Borrowed from French crédibilité, from Medieval Latin credibilitas, from Latin credibilis.

etymonline

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credibility (n.)

"quality of being credible, capacity or condition of being believed, just claim to credit," 1590s, from Medieval Latin credibilitas, from Latin credibilis (see credible). Credibility gap is 1966, American English, in reference to official statements about the Vietnam War.