Accountant
Middle English: from Law French, present participle of Old French aconter (see account). The original use was as an adjective meaning ‘liable to give an account’, hence denoting a person who must do so.
wiktionary
From Middle English, from Middle French acuntant. Equivalent to account + -ant. First attested in the mid 15th century.
accountant ( comparative more accountant, superlative most accountant)
etymonline
accountant (n.)
mid-15c., "accounting officer, one who renders accounts," from Old French acontant (Modern French accomptant), from present participle of aconter "to count, enumerate" (see account (v.)). Sense of "professional maker of accounts" is recorded from 1530s. The word also was an adjective in Middle English, "accountable; liable to render accounts" (early 15c.).
