Accounting

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Middle English (in the sense ‘counting’, ‘to count’): from Old French acont (noun), aconter (verb), based on conter ‘to count’.

wiktionary

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accounting

etymonline

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accounting (n.)

"reckoning of numbers," late 14c., verbal noun from account (v.). From 1855 as "management of financial affairs." Phrase no accounting for tastes (1823) translates Latin de gustibus non est disputandum, from account (v.) in the "give an explanation" sense.