Discrepancy

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early 17th century: from Latin discrepantia, from discrepare ‘be discordant’, from dis- ‘apart, away’ + crepare ‘to creak’.

wiktionary

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Borrowed from Latin discrepantia, from discrepans, from discrepō, from crepō. See also discrepant.

etymonline

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discrepancy (n.)

"variance or contrariety, especially of facts or sentiments," mid-15c. (discrepauns, discrepance), from Latin discrepantia "discordance, discrepancy," from discrepantem (nominative discrepans), present participle of discrepare "sound differently, differ," from dis- "apart, off" (see dis-) + crepare "to rattle, crack" (see raven). Modern form is from early 17c. Related: Discrepancies.